Ingredients
– 10 eggs
– 1 3/4 cups sugar
– 1 tablespoon cacao, heaping
– 4 tablespoons flour, heaping
– 2 sticks butter
– 25-50 grams butter
– 75-150 grams dark chocolate
– 1/2 cup milk
– 2 tablespoons heavy cream
– Salt

Cake
1. Separate the eggs
2. Add a pinch of salt to the whites
3. Beat the whites on low speed and slowly add flour, sugar, and cacao
4. Using a spoon, carefully transfer to a baking sheet, lined with parchment paper
5. Preheat oven to 270 and bake for 35 minutes (Do NOT open the oven for the first 25 minutes)
6. Cut in half and peel away from wax paper as soon as cool enough to handle
7. Allow cake to cool completely
8. Spread half of cream filling on each piece and stack
9. Cool in refrigerator for several hours before covering with frosting

Cream Filling
1. Combine yolks and 3/4 cup of sugar
2. Add 1/2 cup of milk
3. Transfer to a small saucepan and heat on low-medium heat
4. Stir continuously until mixture starts to boil
5. Mixture should thicken and begin to form clumps
6. Remove from heat and cool
7. Add 250 grams of softened butter and whip

Frosting
1. In a double boiler, melt 25-50g of butter
2. Add 75-150g of chocolate
3. Add 2 tbsp of heavy cream
4. Stir until mixed evenly