Banana Whoopie Pies - cooking recipe

Ingredients

2 cups all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
1/2 cup mashed banana
1/2 cup sour cream
4 ounces unsalted butter, softened
1/2 cup granulated sugar
1/2 cup packed brown sugar
1 large egg
1 teaspoon pure vanilla extract
16 ounces cream cheese, softened
1 cup confectioners' sugar, plus
more confectioners' sugar, for dusting

Preparation

Preheat oven to 350. Line 2 baking sheets with parchment. Sift flour, baking powder, baking soda and salt into a bowl. Combine banana and sour cream in another bowl.
Beat butter, granulated sugar and brown sugar with a mixer on medium-high speed, until pale and creamy. Add egg and 1/2 teapsoon vanilla, beating until incorporated. Add banana mixture in 2 additions, alternating with the flour mixture.
Transfer batter to a pastry bag fitted with a 1/4 inch plain tip (I just used a disposable pastry bag and clipped the end off) Pipe batter into 1 1/4 inch rounds on baking sheets, spacing about 1 1/2 inches apart.
Bake until edges are golded, about 12 minutes. Slide parchment, with cookies onto wire racks, Let cool.
Beat Cream cheese, confectioners' sugar and remaining 1/2 teaspoon vanilla with a mixer on medium speed until smooth.
Pipe or spoon 1 tablespoon cream cheese mixture onto the flat side of half the cookies. Sandwich with remaining cookies. Dust with confectioners' sugar and serve immediately.