1-First, gather all your ingredients and line a 9-inch square baking dish with parchment paper for easy removal later. In-eastern a mixer, beat the softened butter and light corn syrup together until they combine smoothly. Add the vanilla extract, powdered sugar, kosher salt, and milk, then keep beating until the mixture turns smooth and even.

2-Next, transfer about two-thirds of this mixture to a separate bowl, and mix several drops of yellow food coloring into the remaining portion for that classic look. Melt the chocolate following the package instructions, then pour half of it into the prepared pan to form the base. Spread the white layer evenly over the chocolate, followed by gently dropping and spreading the yellow layer on top.

3-Finish by pouring the rest of the melted chocolate over everything and spreading it out smoothly. Pop the pan in the refrigerator until the chocolate hardens, which takes about 30 minutes. Once it’s set, use a very hot knife to cut it into squares, and store the pieces in a covered container in the fridge for freshness. This no-cook method means you can have this treat ready without turning on the oven, making it a fun option for any day.