
Ingredients
- 1¼ cups cake flour
- 1½ tsps baking powder
- ½ tsp salt
- 1 tbsp coffee
- 4 egg yolks
- ½ cup water
- ½ tsp vanilla
- ¼ cup oil
- 4 egg whites
- ½ tsp cream of tartar
- ¼ cup sugar
- 1 cup unsalted butter
- 2½-3 cups icing sugar
- 2 tsp coffee
- 1 tsp vanilla
- Optional: 1-2 tsp milk
Instructions
- Preheat oven to 350°F. Line the 11x15 inch jelly roll pan with parchment paper. Set aside.
- In a bowl, sift dry ingredients: flour, baking powder, salt, and sugar.
- Whisk lightly and make a well at the center.
- Add liquid ingredients: coffee, egg yolks, water, vanilla, and oil. Mix until smooth
- In a standing mixer with whisk attachment, add the egg whites.
- When it starts to bubble, add cream of tartar.
- Slowly add the sugar. Beat until stiff.
- Fold the egg whites mixture into the egg yolk mixture.
- Pour into pan and bake for about 20-25 minutes until golden brown.
- Prepare a parchment paper and invert the cake.
- Roll the cake tightly while it's still hot. You can use a towel beneath the parchment paper to prevent your hands from burning. Let it cool completely. Note: It is more easier to roll the cake while its hot. This will help you prevent cracks in occurring.
- Cream the butter.
- Add the icing sugar until combined. Scrape the sides and bottom of the bowl.
- Mix in the vanilla and coffee.
- optional: if the frosting is still thick add milk a teaspoon at a time until your desired consistency.
- Unroll the cake. Spread the mocha butter icing.
- Roll again.
- Frost all side of the cake.
- Optional: sprinkle with melted chocolate or fruits on top
