Whip 1/2 stick of butter and brown sugar, once combined, add 3 eggs, 1 1/2 tablespoons of vanilla, and 1 1/4 cups of sour cream. Continue whipping.
Sift the dry ingredients for the cake using a strainer, this helps prevent lumps from forming. Integrate this into the previous mixture.
Pour the mixture into a mold and bake at 190°C for one hour or until a toothpick inserted comes out clean.
For the coffee cream: whip the egg whites in a bowl over a double boiler without the bowl touching the water, just the steam, add the cream of tartar, after 3 minutes add the powdered sugar, add the coffee and integrate it. Remove from heat and beat with an electric mixer in a bowl until peaks form.
Change the whisk attachment of the mixer for a paddle attachment, (do it manually with a silicone or wooden spatula if you don't have this accessory) and gradually add the butter cut into pieces, continue mixing until you achieve a creamy mass. Refrigerate for 30 minutes.
Remove the cake from the oven, let it cool and unmold. Take the cream out of the refrigerator and cover the cake with the help of a spatula or offset spatula, finally sprinkle a bit of instant coffee on top.
Nutritional Information
* * Information per 100g serving, percentage of daily values based on a 2,000 calorie diet.
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