Peanut Butter Filled Chocolate Sandwich Cookies - The BakerMama

Ingredients

• 2 cups all-purpose flour
• 3/4 cup unsweetened cocoa powder
• 1 and 1/2 teaspoons baking powder
• 1 teaspoon kosher salt
• 1 cup (2 sticks) unsalted butter, softened
• 1 cup granulated sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1/2 cup (1 stick) unsalted butter, room temperature
• 1 cup creamy peanut butter
• 1 and 1/4 cups powdered sugar