In a separate bowl, whisk together the peanut butter and sugar until well combined. It should become a bit thick and frosting-like.
Spread a thick layer of the peanut butter mixture on each graham, right to the edges.
Dunk the peanut butter grahams in the melted chocolate to coat. You can either dip them entirely, or just do a quick dip of the peanut butter-covered side. Place the chocolate-covered grahams, peanut butter side up, onto a sheet lined with wax paper, parchment paper or a silicone baking mat.
Let the bars dry and solidify on the counter (will take a while!) or place them in the refrigerator or freezer to chill until set.
Recipe by Go Dairy Free at https://www.godairyfree.org/recipes/chocolate-peanut-butter-cup-graham-bars