Katelyn+&+Kristen

1 cup boiling hot water H2O 3/4 cup (75g) natural unsweetened cocoa Co 2 cups (260g) all-purpose flour F  1 1/2 teaspoons baking soda Bs  3/4 teaspoon sea salt Cs  1 cup (200g) superfine sugar S  1 cup (240g) golden brown sugar Br  1 cup (2 sticks) unsalted butter, cool room temp Bu  4 whole eggs (large), cool room temp, lightly beaten 3/4 cup (6 ¼ oz) buttermilk, cool room temp 2 teaspoons vanilla extract Buttermilk Frosting (Below) Directions: 1: Preheat oven to 350 degrees F. or 325 F if using black cake pans. 2: Grease and flour 2 9 inch round pans and line with parchment 3: Combine water and cocoa in a bowl and stir until smooth. Reserve. 4: Sift together dry ingredients. Reserve. 5: In large bowl of an electric mixer, cream butter and sugars. 6: Beat in eggs and vanilla. Stir buttermilk into cocoa mixture. 7: Add alternately with dry ingredients in 3 additions. 8: Pour into pans. 9: Bake 28-38 minutes (see note) or until a toothpick comes out barely clean. Cool and frost. **Chocolate Buttermilk Frosting** 2 oz unsweetened chocolate 2 oz semi-sweet chocolate 2 sticks (8 oz) unsalted or salted butter 1/4 cup unsweetened cocoa powder 4 cups sifted powdered sugar (3 ½ cups unsifted) 1/4 cup buttermilk (or regular milk plus more if needed) 2 teaspoons vanilla Pinch or two of salt Chocolate Frosting: Melt both chocolates in microwave, double boiler or bowl set over barely simmering water; set aside to cool. Beat the butter until creamy. Stir in the cocoa power, about a cup of the powdered sugar, and the cooled melted chocolate. Scrape sides of bowl and beat well; add remaining powdered sugar, then add milk, vanilla and salt, beating and scraping until you get the consistency you like. Equation Cake:4mol H2O + 5mol Un + 4mol F + 6mol Bs + 5mol NaCl + 4mol S + 4mol Br + 4mol Bu + 16mol Eg + 4mol Bm + 8mol V ---> 4 cakes Equation Frosting:2mol Uc + 2mol Sc + 2mol Bu + 1mol Um + 14mol Ps + 6mol Bm + 4mol V> 2 frostings
 * Favorite Cocoa Layer Cake with Chocolate Buttermilk Frosting**

If you had 1 3/4 cup sugar, 2 eggs, and enough of the rest of your ingredients, how much cake could you bake?

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