Step 1

Line an 8-by-8-inch baking dish with plastic wrap, leaving excess to hang over the sides.

Step 2

Place the graham crackers in a food processor and pulse until finely ground, then add the confectioners’ sugar and salt and give it a few more pulses. Add the melted butter and 1 cup of the peanut butter. Pulse until incorporated, then pour the mixture into the baking dish and pat the crust into an even layer.

Step 3

Melt the chocolate chips over a double boiler, stirring frequently until smooth, about 5 minutes. Whisk in the remaining 1/4 cup peanut butter. Pour the chocolate over the crust and sprinkle with flaky sea salt, then place in the refrigerator to set for at least 2 hours or up to overnight.

Step 4

Once set, lift the bars out of the baking dish using the overhanging plastic wrap. Remove the plastic and place the bars on a cutting board and cut into squares. Dollop marshmallow creme over each square. Use a kitchen torch to brown the marshmallow creme right before serving.