Peanut Butter Cookie Bars recipe

unsalted butter, softened to room temperature

light brown sugar, packed

peanut butter (not natural or whipped)

and ½ teaspoons vanilla

large egg

all-purpose flour

cornstarch

baking powder

unsalted butter, softened to room temperature

and ¼ cup confectioner's sugar, sifted

natural cocoa powder, sifted

vanilla

salt

whipping cream