Sponge:
- 2 1/2 cups self-rising flour
- 1/2 cup cocoa powder
- 1 teaspoon baking powder
- 1/4 teaspoon baking soda
- 1 cup light brown sugar
- 1 1/2 cups soy milk + 1 teaspoon vinegar
- 1/2 cup soy yogurt
- 1/2 cup light olive oil
Chocolate Hazelnut Buttercream:
- 1 cup unsalted butter room temperature
- 3 1/4 cups powdered sugar
- 1 1/4 cups chocolate hazelnut spread homemade or store-bought
- 1 1/2 tablespoons milk room temperature
- Pinch of salt
Ganache:
- 1 1/4 cups chocolate hazelnut spread
- 3/4 cup cream
Crushed hazelnuts for topping