Step 1

Preheat oven to 400 degrees. Brush six mini-bundt molds with softened butter and dust them with flour.

Step 2

Melt the remaining butter with both chocolates and the orange rind in a mixing bowl set over a pan of boiling water. Remove from heat and stir to combine them.

Step 3

In a separate bowl, beat the eggs, egg yolks and sugar together until they form a ribbon. Sift the flour on top and fold it in. Fold into the chocolate in two portions.

Step 4

Pour the batter into the prepared molds and bake for six minutes. Remove from the oven, allow to sit for five minutes, unmold and serve with whipped cream.