1-First Step: Prep the pan and oven. Start by preheating your oven to 325F (165C). Line a 9×9 inch baking pan with parchment paper, leaving a little overhang if you want easy lifting later. This lower baking temperature helps the brownies bake more evenly and keeps the center fudgy instead of dry. If you usually bake in glass pans, a metal pan is a better choice here. Metal heats more evenly and helps the brownies bake in the time listed. That small swap can make a big difference in texture.

2-Second Step: Melt the butter and white chocolate. Place the 10 tablespoons (141 g) unsalted butter, cut into pieces, and the 6 oz (170 g) white chocolate bar, chopped, into a microwave-safe bowl. Heat in 20-second bursts, stirring after each round, until the mixture is melted and smooth. Slow melting matters because white chocolate can seize or turn grainy if it gets too hot too fast. If the mixture looks clumpy or separated, stop and begin again. It is better to restart than to force a broken mixture into the batter. This step sets the stage for gooey blondies with a silky crumb.

3-Third Step: Whisk the eggs and sugar well. In a separate bowl, vigorously whisk together the 1 1/4 cups (250 g) granulated sugar, 2 large eggs, and 1 large egg yolk. Whisk until the mixture turns pale yellow, which should take about 30 seconds by hand or about 15 seconds with an electric mixer on high. This is the step that helps create that shiny, crackly top people love in easy gooey white chocolate brownies. Do not rush this part. The extra air added here gives the bars a nicer top without making them cakey. If you want that bakery look, this is where it starts.

4-Fourth Step: Add vanilla and melted chocolate. Stir in 1/2 teaspoon vanilla extract, then pour in the melted butter and white chocolate mixture. Stir until everything is fully combined and smooth. The batter should look glossy and pale. At this stage, the aroma is already amazing. The vanilla adds warmth and rounds out the sweetness, which is important in any white chocolate brownies recipe since white chocolate can be very rich.

5-Fifth Step: Mix the dry ingredients. In another bowl, whisk together 1 3/4 cups (220 g) all-purpose flour, 1 teaspoon salt, and 1/4 teaspoon baking powder. Then stir the dry mixture into the wet mixture until it is fully combined. Mix just until no streaks of flour remain. Overmixing can make the bars tougher than you want. The baking powder is important because it keeps the bars from becoming overly dense. Baking soda is not a good swap here, so stick with the listed ingredient for the best outcome.

6-Sixth Step: Fold in the chips. Gently fold in 1 cup (170 g) white chocolate chips with a spatula. This gives the brownies extra creamy pockets and a little more texture in every bite. If you prefer, you can replace the chips with extra chopped white chocolate for a slightly more refined finish. This is one of the easiest ways to make the bars feel extra indulgent without adding any complicated work. It also gives the recipe that classic white chocolate blondies recipe feel, with soft bites throughout.

7-Seventh Step: Spread and bake. Spread the batter evenly into the prepared baking pan. Bake on the center rack for 42 minutes, or until a toothpick inserted into the center comes out clean or with moist crumbs. Do not overbake if you want that soft, gooey center. The edges should look set while the middle stays tender. Because oven temperatures can vary, start checking near the end of baking time. If your oven tends to run hot, keep a close eye on the top so the bars do not brown too much.

8-Eighth Step: Cool and slice. Let the brownies cool completely before slicing. This matters more than it sounds like it does. If you cut them too early, the center can look underbaked and overly gooey, even if the bars are perfectly done. Once cooled, lift them from the pan using the parchment and cut into 16 squares. The texture will be soft, rich, and just sweet enough to make people reach for a second piece.