Cooking Instructions
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Step 1
To make the coffee sponge, preheat the oven to 180 degrees C (350 degrees F). Line the bottom and sides of 2x8-inch springform/loose-bottomed round tins.
Step 2
In the bowl of a stand mixer, beat the
Eggs (8)
with both
Brown Sugar (1/2 cup)
and
Vanilla Sugar (1/2 cup)
till thick and mousse-like, 7-10 minutes.
Step 3
Add the
Coffee Extract (1 tsp)
,
Instant Coffee (3 Tbsp)
, and
Vanilla Extract (1 tsp)
and beat in again for a minute, then beat in the
Baking Powder (1 tsp)
and
Salt (1 pinch)
.
Step 4
Sift the
All-Purpose Flour (1 cup)
in 3 batches, folding gently until it’s just mixed. Be careful not to release the beaten-in air.
Step 5
Turn the batter into the prepared baking tin, and bake for 30-35 minutes, till a tester comes out clean.
Step 6
Cool completely on racks, then slice into two horizontally, for a total of 4 layers.
Step 7
To make the coffee syrup, place
Corn Starch (2 Tbsp)
,
Water (1/3 cup)
,
Granulated Sugar (1/2 cup)
, and
Instant Coffee (1 Tbsp)
in a small pan and whisk until sugar dissolves and mixture thickens slightly. Cool.
Step 8
To make the coffee mascarpone filling, whip the
Cream (9 oz)
,
Powdered Confectioners Sugar (1/2 cup)
, and
Instant Coffee (1 Tbsp)
together till medium stiff peaks form. Fold in the
Mascarpone Cheese (1 cup)
. Taste and adjust sweetness if required.
Step 9
To make the dark chocolate ganache, place chopped
52% Couverture Chocolate (2 1/2 cups)
and
Half and Half (10.5 oz)
in a heatproof bowl and run at high in the microwave for 1 minute. Whisk until smooth, then leave it to rest to cool. Whisk again before using.
Step 10
To assemble, brush each layer with the coffee syrup, and sandwich with the filling.
Step 11
Give the whole cake a thin layer of ganache as a base coat. Let it set for about 5 minutes.
Step 12
Frost with the remaining ganache. Sift over with
Unsweetened Cocoa Powder (to taste)
and garnish with
Chocolate Shavings (to taste)
and
Coffee Beans (to taste)
.
Step 13
Chill for about an hour or overnight. The flavors mature nicely over time. Slice and serve!
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