Chocolate Chip Banana FlufferNutter Sandwich Cookies

Bahan-bahan (18 porsi)

• 1 3/4 cup flour
• 1 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 6 tablespoons unsalted butter (softened to room temperature)
• 1/2 cup brown sugar
• 3/4 cup powdered sugar
• 1/2 cup peanut butter
• 1 egg
• 2 teaspoons vanilla
• 1 cup banana (mashed (about 1/2 ))
• 3/4 cup chocolate chips
• 4 egg whites
• 1 cup sugar
• 1/4 teaspoon cream of tarter