Ingredients

  • 2 1/4 cups sifted cake flour (sifted before measuring)
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup sugar
  • 2 tablespoons organic unsalted butter, at room temperature
  • 1 ripe, fresh organic avocado, pureed in a food processor or blender until smooth
  • 1 teaspoon vanilla extract
  • 2 large organic eggs
  • 1 cup low-fat organic buttermilk
  • 8 ounces powdered sugar
  • 1/4 cup pasteurized egg whites
  • 1 ripe, fresh organic avocado, peeled and pitted
  • Juice of 1 whole organic lime
  • 1 pound organic unsalted butter
  • 2 1/4 ounces organic unsalted butter
  • 2 1/4 ounces brown sugar
  • 1/2 ounce almond paste
  • 1 teaspoon vanilla extract
  • 4 1/2 ounces all-purpose flour
  • 3 1/2 ounces toasted oats cereal
  • 3 ripe organic bananas, cut into 1/4-inch cubes
  • 1/2 cup granulated sugar
  • 3 teaspoons soft unsalted butter
  • 3 teaspoons organic heavy cream
  • Pinch organic cinnamon
  • Lime zest, for garnish

Method

  • For the cupcakes: Preheat the oven to 325 degrees F. Line 2 cupcake baking pans with paper liners.
  • Sift together the flour, baking powder, baking soda and salt in a bowl; set aside.
  • Beat the sugar, butter and pureed avocado until completely combined in the bowl of a stand mixer.
  • Beat in the vanilla, then beat in the eggs one at a time, mixing well after each addition.
  • Beat in the buttermilk with the mixer on low speed until just combined.
  • Add the flour mixture.
  • Once all the flour is incorporated, increase the mixing speed to medium and beat for 20 seconds longer.
  • Be careful not to over-mix.
  • Divide the batter among the pans and bake until golden on top and a wooden toothpick inserted in the center comes out clean, about 25 minutes.
  • Cool in the pans on wire racks for 10 minutes before inverting, removing papers and cooling completely.
  • For the buttercream frosting: Beat the powdered sugar and egg whites for about 5 minutes on medium-high speed using an electric mixer.
  • Puree the avocado and lime juice in a food processor.
  • Add the butter to the whites mixture and beat until very creamy, about 10 minutes, then add the avocado and lime juice and mix well.
  • For the streusel: Cream together the butter, sugar and almond paste using an electric mixer.
  • Add the vanilla and cinnamon and mix well.
  • Add the flour and toasted oats in batches until large crumbs start forming.
  • For the caramelized bananas: Make a dry caramel by pouring the sugar in an even layer into a heavy-bottomed saucepan.
  • Heat over medium heat until the caramel starts to melt, gently pushing the sugar towards the center.
  • Continue cooking, stirring only very occasionally, until the caramel turns a dark copper, taking care that the caramel doesn't burn.
  • Transfer to a bowl, stir in the bananas until coated and caramelized, and then stir in the butter, cream and cinnamon.
  • For assembly: Remove the centers of the cupcakes using a melon baller and fill with the caramelized bananas.
  • Pipe the avocado-lime frosting on top, sprinkle with the oats streusel and garnish with lime zest on top.