Homemade Thin Mints Recipe Easy Copycat Cookies

By:

Wade Lockhart

Published:

March 30, 2026

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Why You’ll Love These Homemade Thin Mints

These Homemade Thin Mints are a fun, bakery-style treat with crisp chocolate cookies and a cool mint coating that tastes just right. They give you that classic thin, snappy bite at home, and you can make the dough ahead of time, freeze it, and bake whenever you want a fresh batch.

Easy to make ahead: The dough can be mixed, rolled, and chilled or frozen before baking, which makes these Homemade Thin Mints a smart choice for busy weeks. You can also freeze the baked cookies for a quick snack later.
Balanced flavor: The cocoa cookie base and mint chocolate coating work together for that signature mix of deep chocolate and cool peppermint without tasting too sweet.
Great for sharing: These cookies are perfect for lunchboxes, after-dinner treats, cookie boxes, and bake sales. They travel well when chilled and hold their shape nicely.
Simple ingredients: You only need pantry staples like flour, cocoa, butter, sugar, and chocolate to make a batch that tastes special enough for any occasion.

Tip: If you like a stronger mint finish, you can adjust the peppermint flavor in the coating a little to match your taste.

Because these cookies are served cold, they have a refreshing snap that makes them feel extra close to the store-bought favorite. If you enjoy make-ahead desserts, you may also like our easy chocolate dessert ideas and make-ahead sweet treats.

Jump To

1. Why You’ll Love These Homemade Thin Mints
2. Essential Ingredients for Homemade Thin Mints
3. How to Prepare the Perfect Homemade Thin Mints: Step-by-Step Guide
4. Dietary Substitutions to Customize Your Homemade Thin Mints
5. Mastering Homemade Thin Mints: Advanced Tips and Variations
6. How to Store Homemade Thin Mints
7. Nutrition Facts for Homemade Thin Mints
8. FAQs: Frequently Asked Questions About Homemade Thin Mints
9. Homemade Thin Mints

Essential Ingredients for Homemade Thin Mints

Here is the full ingredient list for these Homemade Thin Mints, with every measurement included so you can prep with confidence.

For the cookie

2 cups all-purpose flour
1/2 cup unsweetened Dutch-processed cocoa powder
1/2 teaspoon salt
1 cup unsalted butter, softened
2/3 cup granulated sugar
1 large egg white
1 teaspoon vanilla extract
1/2 teaspoon peppermint extract

For the coating

12 ounces dark or semisweet chocolate, coarsely chopped
1/2 teaspoon vegetable oil
1/4 teaspoon peppermint extract

What each ingredient does

All-purpose flour: Gives the cookies their structure and crisp bite.
Dutch-processed cocoa powder: Brings a smooth, deep chocolate flavor.
Salt: Sharpens the flavor and keeps the sweetness in check.
Unsalted butter: Creates a rich cookie base and helps the dough roll smoothly.
Granulated sugar: Adds sweetness and helps the cookies crisp up.
Egg white: Binds the dough while keeping the texture light.
Vanilla extract: Adds warmth and rounds out the chocolate flavor.
Peppermint extract: Gives the classic mint cookie taste.
Dark or semisweet chocolate: Makes the glossy coating on the outside.
Vegetable oil: Helps the chocolate melt smoothly and dip more easily.

Special dietary options

Vegan: Use plant-based butter, a liquid egg replacer, and dairy-free dark chocolate.
Gluten-free: Swap the flour with a 1:1 gluten-free baking blend.
Lower sugar: Use a darker chocolate and slightly reduce the sugar if you prefer a less sweet cookie.

If you enjoy baking with peppermint, you may also want to read our chocolate peppermint dessert ideas for more cool, minty treats.

How to Prepare the Perfect Homemade Thin Mints: Step-by-Step Guide

Making Homemade Thin Mints is straightforward, but chilling and shaping the dough the right way matters a lot. These cookies bake up best when the dough is firm and the chocolate coating is smooth, so a little patience goes a long way.

First Step: Mix the dry ingredients

Start by combining the flour, cocoa powder, and salt in a medium bowl. Stir them together well so the cocoa is evenly spread through the flour. Set the bowl aside while you work on the butter mixture. This step helps the cookie dough bake evenly and gives the cookies their even chocolate color.

Second Step: Cream the butter and sugar

In a large bowl, beat the softened butter and granulated sugar until the mixture looks smooth and creamy, about 3 minutes. You want it light enough to blend well with the wet ingredients. This creates the base that gives these Homemade Thin Mints their tender, crisp texture.

Third Step: Add the egg white and extracts

Beat in the egg white, vanilla extract, and peppermint extract. The dough may look a little curdled at this stage, and that is completely normal. Keep going, because it comes together once the dry ingredients are added. If you want a stronger mint flavor, you can add a little extra peppermint extract later in the coating instead of changing the dough.

Fourth Step: Add the dry mixture

Gradually add the flour mixture in three parts, beating just until each addition is mixed in. Scrape down the sides of the bowl as needed so no dry pockets remain. Avoid overmixing, because that can make the cookies less crisp. The dough should be soft but easy to handle.

Fifth Step: Roll and chill the dough

Divide the dough in half. Place each portion between two sheets of parchment paper and roll it to about 1/4-inch thickness. Keeping the dough between parchment makes it easier to work with and helps prevent sticking. You can stack the rolled slabs with parchment between them if you need to save space in the fridge or freezer.

Refrigerate the dough slabs for at least 3 hours, or freeze them for 1 hour if you need to move faster. The dough can also be refrigerated for up to 3 days or frozen for up to 2 months, which makes these cookies great for planning ahead.

Sixth Step: Cut the cookies

Preheat the oven to 350°F and line baking sheets with parchment paper. Remove the top layer of parchment from one dough slab, then cut out 2-inch circles. Place the cookies about 1.5 inches apart on the prepared baking sheets. Gather the scraps, reroll them, and chill the dough again before cutting more rounds. This extra chill helps the cookies keep their shape.

Seventh Step: Bake until firm

Bake the cookies for 15 to 18 minutes, or until they feel firm to the touch. They should be set but not hard. Let them cool on the baking sheet for 5 minutes, then move them to a wire rack to cool completely. If you have a stone tray, that can help with texture. Metal sheets may brown the bottoms too quickly.

Eighth Step: Melt the coating

For the chocolate coating, place the chopped chocolate, vegetable oil, and peppermint extract in a heatproof bowl set over a pan of simmering water. Stir until the chocolate is smooth and glossy. Using chopped bar chocolate instead of chips gives a smoother melt, which makes dipping easier. A double boiler setup helps keep the chocolate at the right texture while you work.

Helpful tip: Stir in small amounts of peppermint extract to keep the mint flavor balanced without overpowering the chocolate.

Ninth Step: Dip and set

Use a fork to dip each cooled cookie into the melted chocolate. Lift it out and tap the fork gently on the side of the bowl so the excess chocolate falls off. Place the coated cookies on a parchment-lined sheet. Once all the cookies are dipped, refrigerate them for about 10 minutes until the chocolate is set.

Tenth Step: Serve cold

Serve the cookies cold for the best snap and the cleanest mint chocolate flavor. That chilled bite is part of what makes Homemade Thin Mints so loved. If you want a firmer shell, tempering the chocolate coating can give the cookies a crisp snap.

Step	Time	What to look for
Mix dough	10 minutes	Soft dough with even cocoa color
Chill dough	3 hours or 1 hour frozen	Firm slabs that roll and cut cleanly
Bake	15 to 18 minutes	Cookies feel firm to the touch
Dip and chill	About 10 minutes	Chocolate sets with a smooth finish

Dietary Substitutions to Customize Your Homemade Thin Mints

Protein and main component alternatives

If you need to adjust the recipe, there are a few easy swaps that still keep the spirit of Homemade Thin Mints. For a dairy-free version, use plant-based butter and a dairy-free chocolate bar. If you need to skip the egg, a liquid egg replacer can help bind the dough, though the texture may be a little softer. For gluten-free baking, a good 1:1 gluten-free flour blend works best because it keeps the dough easy to roll and cut.

Vegetable, sauce, and seasoning modifications

Since this recipe is all about cookie dough and chocolate coating, the main flavor tweaks come from the mint and chocolate balance. You can add a bit more peppermint extract if you like a stronger mint taste, or keep it lighter for a milder cookie. If you want a richer chocolate finish, use semisweet chocolate; for a deeper cocoa flavor, pick dark chocolate. A tiny bit more vegetable oil can help thin the coating if your chocolate feels too thick for dipping.

For people watching sugar intake, use a darker chocolate with less added sugar and enjoy the cookies in smaller portions. That way, you still get the classic flavor without making the cookies feel too heavy.

Mastering Homemade Thin Mints: Advanced Tips and Variations

A few small techniques can take your Homemade Thin Mints from good to really memorable. For the best cookie texture, chill the rolled dough until it is very firm before cutting. If the dough softens while you are working, pop it back into the fridge for a few minutes. This keeps the edges neat and helps the cookies bake evenly.

When melting the chocolate, use a double boiler instead of high heat. Gentle heat protects the chocolate from scorching and keeps it smooth enough for dipping. If the coating starts to thicken, set the bowl back over the steam for a short time and stir well. Tempering the chocolate is another great option if you want a crisp, glossy shell with a satisfying snap.

For flavor variation, try a slightly stronger peppermint finish if you like a sharper mint taste. Food-grade peppermint oil can be used in very small amounts for a bolder result. You can also make the cookies a little more chocolate-forward by using darker chocolate in the coating. For presentation, place the finished cookies in neat stacks on a chilled plate or box them in parchment-lined tins for gifting.

If your schedule is packed, make the dough a day or two ahead, then freeze the baked cookies once they are coated. That way, you always have a batch ready for a quick dessert or after-school snack.

How to Store Homemade Thin Mints

These cookies store well, which is one more reason people love Homemade Thin Mints. Keep them in an airtight container in the refrigerator for up to 7 days. Layer parchment between the cookies if you are stacking them so the chocolate coating stays neat.

For longer storage, freeze the uncoated or coated cookies for up to 2 months. If you freeze them coated, place them in a freezer-safe bag or container and thaw them at room temperature for about 20 minutes before serving. You can also freeze the dough for up to 2 months, then thaw it in the fridge overnight before cutting and baking.

These cookies are best served cold, so refrigeration actually helps their texture. If you are planning ahead for a party, bake and coat them early, then chill until ready to serve.

Nutrition Facts for Homemade Thin Mints

Here is the nutrition information for one cookie, based on the recipe provided.

Nutrient	Amount per cookie
Calories	115 kcal
Carbohydrates	12g
Protein	1g
Fat	7g
Saturated Fat	4g
Polyunsaturated Fat	0.3g
Monounsaturated Fat	2g
Trans Fat	0.2g
Cholesterol	11mg
Sodium	29mg
Potassium	66mg
Fiber	1g
Sugar	6g
Vitamin A	130 IU
Calcium	8mg
Iron	1mg

If you want to read more about peppermint, visit WebMD’s peppermint health guide. For more about chocolate, see Mayo Clinic’s look at chocolate and health.

FAQs: Frequently Asked Questions About Homemade Thin Mints

How do I make the dough for homemade Thin Mints ahead of time?

Yes, you can prepare the dough for homemade Thin Mints in advance to save time. After mixing, roll it out between parchment paper into a rectangle about 1/8-inch thick, then wrap tightly in plastic and refrigerate for up to 3 days. For longer storage, freeze the rolled dough for up to 2 months—thaw in the fridge overnight before cutting into rounds with a 1.5-inch cutter. This prevents the dough from drying out and makes baking day easier. When ready, bake at 350°F for 10-12 minutes until edges are firm but centers are pale. Let cool completely before dipping in melted chocolate. Pro tip: Label frozen dough with the date to track freshness. This method keeps the crisp texture perfect for that authentic Girl Scout cookie bite. (92 words)

What if the dough for homemade Thin Mints looks curdled after adding egg whites?

Don’t worry—curdled dough is common when adding egg whites to the butter-sugar mixture in homemade Thin Mints recipes and won’t affect the final cookies. It happens because cold egg whites cause the fat to separate temporarily. Just keep mixing on low speed for 1-2 minutes until it smooths out somewhat, then proceed with dry ingredients like flour, cocoa, and peppermint extract. The dough will come together fully during kneading. If it stays slightly separated, chill for 15 minutes before rolling. Baked cookies will be tender and crisp regardless. Test a small batch first if concerned. This issue arises in 80% of home bakers’ first tries but resolves easily for pro results. (112 words)

How do I melt chocolate for coating homemade Thin Mints?

Use the double boiler method for smooth melting without scorching. Fill a saucepan with 1-2 inches of water, bring to a simmer, then place a heatproof bowl with 12-16 oz dark or semisweet chocolate chips (60% cocoa ideal for mint balance) over it—ensure the bottom doesn’t touch water. Stir occasionally as steam gently melts it in 5-7 minutes to 110°F. Add 1 tsp peppermint extract and 1 tbsp coconut oil for shine and thinning. Avoid microwaving to prevent hot spots. Once melted, remove from heat. Dip cooled cookies one by one, tap off excess, and place on parchment-lined tray. This yields 40-50 cookies with even coverage. (108 words)

How do I keep melted chocolate the right consistency for dipping homemade Thin Mints?

Maintain ideal dipping consistency by keeping the chocolate bowl over the simmering double boiler on low heat. Stir gently after every second cookie to redistribute warmth and prevent thickening—aim for a pourable texture like heavy cream. If it firms up, rewarm with 30 seconds over steam or add 1/2 tsp more coconut oil. Work in small batches: melt enough for 10-15 cookies at a time. Room temperature (68-72°F) is best for dipping; too warm and coating drips, too cool and it sets fast. This trick ensures 100% success rate for glossy, crack-free finishes. Refrigerate dipped cookies 10 minutes to set before storing. (104 words)

How long do homemade Thin Mints last and how should I store them?

Fresh homemade Thin Mints stay delicious for up to 7 days in an airtight container in the fridge, maintaining crispness and mint flavor—layer with parchment to prevent sticking. For longer storage, freeze uncoated or coated cookies in freezer bags for up to 2 months; thaw at room temp for 20 minutes. Avoid room temperature storage beyond 2 days as humidity softens them. A single batch (40 cookies) serves 8-10 people. Fun fact: freezing enhances the snap, mimicking store-bought. Check for off smells before eating. Link to our chocolate storage guide for more tips on keeping treats fresh year-round. (102 words)