2 cups all-purpose flour
1/2 teaspoon cinnamon
1/2 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon kosher salt
1/2 cup mashed banana (about 1 large ripe banana)
1/2 cup greek yogurt
1 stick (1/2 cup) unsalted butter, room temperature
1/2 cup granulated sugar
1/2 cup packed light-brown sugar
1 large egg
1 teaspoon pure vanilla extract
Caramel Sauce
1/4 cup sugar
1 tablespoon water
3 tablespoons heavy cream
1/4 tablespoon unsalted butter
1/4 teaspoon pure vanilla extract
pinch kosher salt
4 ounces cream cheese, room temperature
1/2 teaspoon vanilla
2 cups powdered sugar

How to make it

Preheat oven to 350 degrees. Line a baking sheet with parchment paper, or spray with nonstick spray.

Whisk together the flour, cinnamon, baking powder, baking soda, and salt.

In a small bowl, combine the banana and yogurt.

In a large bowl, beat together the butter and sugars until light and fluffy. Add the egg and vanilla and beat to combine.

Add half the banana and mix in. Add half the flour and mix. Repeat with the remaining banana and flour.

Using a half-tablespoon scoop, place the dough onto the baking sheet, about 2 inches apart.

Bake until the edges are golden, about 12 minutes. Remove from sheet and allow to cool.

Meanwhile, make the caramel sauce.

Add the sugar and water to a small saucepan set over medium high heat. Allow to boil without stirring. If crystals begin to form on the side of the pan, use a silicone spatula to scrape it down.

When the liquid starts to brown, swirl the pan. Remove it from the heat when it becomes a dark amber color.

Stirring with a wooden spoon, slowly add the heavy cream. Continue to stir and add the butter, vanilla, and salt. Set aside.

To make the filling, beat the cream cheese and vanilla until smooth. Gradually beat in the powdered sugar until smooth.

To assemble the whoopie pies, spread a small amount of caramel on the underside of one cookie. Spread a small amount of frosting on the underside of another cookie, then sandwich the two together.