1 egg yolk. 1 TBS Soft Butter. 1 TBS Milk. 1 tsp Vanilla. 2 TBS sugar. 1/4 cup AP Flour. 3/4 tsp baking powder.
Preheat your toaster oven to 300* . Prepare the cupcake pan with 2 cupcake liners.
In a measuring cup whisk yolks & sugar until pale yellow, then whisk butter until creamy, add milk & vanilla until incorporated. Then GENTLY mix in all the dry ingredients just until wet. Do not over mix.
Pour the batter in your cupcake liners (try to make them even). Bake for 13-15 minutes or until you test the cakes with a toothpick & it comes out clean. Cool them before frosting.
You can add different mix-ins or extracts to make them unique.
Vanilla Frosting For 2 or more
1/2 cup firm but not cold Butter. 1 cup powdered sugar. 1 tsp Vanilla.
Whip butter until light & fluffy, add powdered sugar & Vanilla. Whip some more.
You can use egg whites instead... But I had so many yolks (made too many Macarons) I needed to somehow get rid of them... & I don't want to make Leche Flan.