Mrs. Stein's Chocolate Cake

Ingredients

• 1.5 teaspoons baking soda 
• 12 servings powdered sugar for garnish, optional
• 1 cup dutch-processed cocoa powder 
• 3 large eggs beaten at room temperature
• 12 servings butter unsalted softened for the pan
• 1 tablespoon juice of lemon fresh
• 0.5 teaspoon sea salt fine
• 1.8 cups caster sugar 
• 2.3 cups flour all-purpose
• 10 tablespoons butter unsalted chilled cut into 1/2-inch cubes ()
• 0.5 ounce baker's chocolate unsweetened finely chopped ()
• 1 teaspoon vanilla extract pure
• 1.5 cups milk whole

Equipment

• bowl
• frying pan
• sauce pan
• oven
• wire rack
• plastic wrap
• ramekin
• stand mixer
• spatula
• measuring cup

Directions

1. Position a rack in the center of the oven and preheat to 350°F. Butter and flour the inside of a 8 to 10-cup fluted tube pan and tap out the excess flour.
2. Combine the milk and lemon juice in a glass measuring cup.
3. Let stand in a warm place (near the preheating oven) while preparing the rest of the batter; the milk will curdle. Sift the flour, cocoa, baking soda, and salt together into a medium bowl.
4. Bring 1/2 inch of water to a simmer in a small saucepan, and turn off the heat.
5. Place the chocolate in a custard cup or ramekin and set in the hot water.
6. Let stand until the chocolate is melted, then remove from the water, being careful not to splash any water into the chocolate, and stir until smooth.
7. Let stand until tepid.
8. Beat the butter in the bowl of a heavy-duty stand mixer fitted with the paddle attachment onmedium-high speed until smooth, about 1 minute. Gradually beat in the sugar, then add the vanilla. Beat until the mixture is very light in color and texture, scraping occasionally, about 4 minutes. Gradually beat in the eggs. Reduce the mixer speed to low. Beat in the cooled chocolate. In thirds, alternating with two equal additions of the milk mixture, add the flour mixture, scraping down the bowl and beating until smooth after each addition. Spoon the batter into the pan and smooth the top with a spatula.
9. Bake until the top of the cake springs back when gently pressed with your finger, and a caketester inserted into the center of the cake comes out clean, about 1 hour. Cool on a wire rack for10 minutes. Invert and unmold the cake onto the rack and cool completely. Sift a light coating ofconfectioners’ sugar on top, if using. (The cake can be stored at room temperature, wrapped in plastic wrap, for up to 2 days.)
10. Reprinted with permission from Sarabeth's
11. Bakery: From My Hands to Yours by Sarabeth Levine with Rick Rodgers, © October 2010 Rizzoli New York