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1
Preheat oven to 350F. Grease three 5-inch cake pans and line the bottoms with parchment paper.
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2
To prepare banana cakes, in a bowl, whisk together egg, sugar, banana, oil and vanilla until smooth.
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3
Sift in flour, baking soda, baking powder and salt. Stir until just combined.
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4
Divide the batter and pour into the prepared cake pans. Bake 15 to 20 minutes or until a toothpick inserted into the cake comes out clean.
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5
Remove from oven. When cool to handle, release cakes from pans and place cakes on rack to cool. Clean the pans. Grease them and line with parchment paper.
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6
To prepare chocolate cake, in a large bowl, whisk the flour, baking powder, baking soda and salt.
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7
In another bowl, whisk the boiling water and cocoa powder until smooth.
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8
Beat butter and sugar together on medium speed in a bowl of a standing mixer until light and fluffy. Beat in eggs, one at a time. Beat in buttermilk and vanilla extract.
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9
Reduce the speed to low and beat in half of the flour mixture, followed by the chocolate mixture. Beat in the remaining flour mixture until just incorporated.
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10
Divide the batter and pour into the prepared cake pans. Bake 15 to 20 minutes or until a toothpick inserted into the cake comes out clean.
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11
To prepare cream cheese frosting, place butter, cream cheese and 1/4 cup dulce de leche in a mixing bowl. Beat until soft and well incorporated. Add powder sugar and continue beating until light and fluffy.
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12
To assemble the cake, place one chocolate cake layer on a serving plate, spread 1/4 cup cream cheese frosting on top, then drizzle 2 tablespoons dulce de leche on the frosting. Alternate with a banana cake layer, frosting and dulce de leche, until the last cake layer is placed. Frost the cake top and sides with the remaining buttercream.
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13
Slowly spoon the dulce de leche over the top of the cake. Use an offset spatula to gently push the dulce de leche over the sides of the cake to create the dripping effect.
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14
Garnish with banana slices, toffee bits and chopped pecans if desired.
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15
Cover and refrigerate the cake. Leave out in room temperature for at least an hour prior to serving.
