01 -
Line a 9x13-inch pan with parchment paper, leaving overhang on two sides for lifting the bars out later.
02 -
In a large bowl, beat the graham cracker crumbs, powdered sugar, melted butter, 1 cup peanut butter, vanilla, and salt until the mixture is thick and evenly combined.
03 -
Transfer the mixture to the prepared pan. Press firmly into an even layer, smoothing the top with a spatula or the bottom of a measuring cup.
04 -
Combine chocolate chips, 4 tablespoons peanut butter, and coconut oil in a microwave-safe bowl. Microwave in 15-second bursts, stirring between each, until smooth.
05 -
Pour the melted chocolate over the peanut butter base and spread it evenly to the edges.
06 -
Refrigerate for at least 1 hour, or until firm. Lift the slab from the pan using the parchment and slice with a warm clean knife.