INGREDIENTS
4 tbsp
unsalted butter, melted
1/3 cup
granulated sugar
1
large egg yolk, white reserved for another use
1/2 tsp
vanilla extract
1/2 cup
+ 2 tablespoons all-purpose flour
1/4 tsp
baking soda
1/8 tsp
fine salt
6
peanut butter chocolate hearts (like Reese's)