Chocolate-Peanut Butter Whoopie Pies | Williams Sonoma

Ingredients

• 12 Tbs. (1 1/2 sticks) (6 oz./185 g) unsalted butter
• 3/4 cup (6 oz./185 g) granulated sugar
• 2 eggs
• 1 tsp. vanilla extract
• 1/2 cup (2 1/2 oz./75 g) all-purpose flour
• 1/2 cup (1 1/2 oz./45 g) unsweetened natural cocoa powder
• 1/4 tsp. baking powder
• 1/4 tsp. baking soda
• 1/8 tsp. kosher salt
• 4 Tbs. (1/2 stick) (2 oz./60 g) unsalted butter
• 1/2 cup (2 oz./60 g) confectioners’ sugar
• 1/2 cup (5 oz./155 g) creamy peanut butter
• 1/2 tsp. vanilla extract