STEP 1 - The Base Layer Assembly

In a medium bowl, combine 1.5 cups creamy peanut butter, 2 cups powdered sugar, 1 cup graham cracker crumbs, 0.5 cup melted and cooled unsalted butter, and 0.25 tsp kosher salt. Using an electric mixer or a wooden spoon, blend thoroughly for at least 2 minutes. The mixture should be completely smooth with absolutely no visible graininess. If you see sugar crystals, keep mixing. Line an 8x8 baking pan with parchment paper. Press the peanut butter mixture firmly into the pan, creating an even layer approximately 0.5 inches thick. Use the bottom of a measuring cup or your hands to compress it evenly. If the mixture looks oily on top, wipe gently with a paper towel to remove excess oil. Refrigerate the base for exactly 15 minutes while you prepare the chocolate.

STEP 2 - The Chocolate Coating Preparation

Place 1.5 cups of milk chocolate chips in a microwave-safe bowl. Microwave at 50% power for 15 seconds. Stir. Microwave again at 50% power for 15 seconds. Stir. Repeat until the chocolate is fully melted (usually takes 45–60 seconds total). The chocolate should be smooth, pourable, and NOT piping hot. If it is hot enough to steam, let it cool for 2 minutes before proceeding. The target temperature is 105–110°F (40–43°C). Do NOT exceed 115°F (46°C)—higher temperatures will cause the cocoa butter to separate, creating a waxy, unpleasant texture.

STEP 3 - The Assembly & Refrigeration

Remove the peanut butter base from the refrigerator after the 15-minute chill. Pour the melted chocolate over the peanut butter layer. Using an offset spatula or the back of a spoon, spread the chocolate into an even layer approximately 0.25 inches thick. Work quickly but gently—the chocolate will begin to set as soon as it touches the cooler base. Once spread evenly, refrigerate the entire pan for exactly 60 minutes at 40°F (4°C). During this hour: the butter in both layers solidifies, the chocolate sets into a crisp, snap-able texture, the peanut butter layer firms up just enough to hold its shape, and the layers bond together.

STEP 4 - The Cut & Serve

After exactly 60 minutes, remove the pan from the refrigerator. Using a sharp chef's knife (warmed under hot water and wiped dry), cut the bars into 16 squares (4 cuts horizontally, 4 cuts vertically). For the cleanest cuts, warm the knife under hot water and wipe dry between each cut. Using the parchment paper as handles, lift the entire sheet of bars out of the pan. Place on a cutting board and separate the individual squares. Serve immediately (if serving cold) or allow to come to room temperature for 5 minutes if you prefer a softer texture. Store in an airtight container in the refrigerator for up to 10 days.