INGREDIENTS
1/2 cup
butter, at room temperature
1/4 cup
packed brown sugar
2 tbsp
granulated sugar
1 tsp
vanilla extract
1/4 tsp
salt
1
egg yolk
3/4 cup
all purpose flour
1/4 cup
unsweetened cocoa powder
1/2
mini chocolate chips
1/2
batch of marshmallow frosting
1/4 cup
graham cracker crumbs, or more if desired