Passion Fruit Cupcakes with Avocado Buttercream Frosting
Butter, for greasing, optional
3 eggs
3/4 cup oil
3/4 cup granulated sugar
3 teaspoons vanilla extract
1 1/2 cups flour, sifted
1 1/2 teaspoons baking powder
1/2 teaspoon strawberry-flavored gelatin
1/4 teaspoon salt
3/4 cup passion fruit rum
2 cups confectioners' sugar
1 stick (1/2 cup) butter
1 teaspoon meringue powder
1 teaspoon vanilla extract
Juice of 1 lime
1/2 ripe avocado
Pinch salt
Instructions:
For the cupcakes: Preheat the oven to 350 degrees F. Butter a 12-cup muffin tin or line with parchment paper.  
Blend the eggs, oil, granulated sugar and vanilla in a mixer. Add the flour, baking powder, gelatin and salt. Add the rum and blend until smooth. Do not over beat. Fill the tins halfway full with batter and bake until a toothpick inserted comes out clean, 15 to 18 minutes.
For the frosting: Cream the confectioners' sugar, butter and meringue powder until creamy and fluffy in a mixer. Add the vanilla and lime juice, cream until well blended. Mix in the avocado until smooth. Do not over beat. Add salt to taste.  
Frost each cupcake with the frosting.
