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My mother made the same birthday cake for every birthday in our house, in the same dented sheet pan, for as long as she could hold a mixing bowl. A yellow cake, from scratch, with a chocolate frosting she cooked in a saucepan and poured over the cake while it was warm, so it set with a soft shine on top and a fudgy layer where it met the crumb. She never bought a box and she never bought a tub, and when other mothers in the neighborhood did, she said nothing out loud, which was its own kind of saying something.
My brother asked for that cake every year until he was forty-one, which is the year she finally handed him the recipe and told him to make it himself. A boxed yellow cake is a perfectly nice cake. It is just not this one. The from-scratch cake has real butter in the crumb and a tighter, richer texture, and the cooked frosting tastes like fudge instead of sweet grease. The secret of it is temperature: warm frosting on a cake that is still a little warm, so the two melt into each other at the top.
Why this yellow birthday cake works
- Butter and sugar beaten a full 4 minutes. That long beating is what makes a from-scratch cake light instead of dense.
- Milk added in turns with the flour. It keeps the batter smooth and the crumb even, with no tunnels.
- A boiled frosting. Butter, cocoa and milk brought to a boil dissolve the cocoa completely, so the frosting tastes like fudge and sets glossy.
- Poured warm. Warm frosting spreads itself and seeps a little into the top of the cake, which is the soft fudgy line everyone remembers.
Ingredients
Makes one 9 by 13 inch sheet cake, 16 generous squares. The measurements are in US cups and spoons with grams in brackets.
For the yellow cake
- 1 cup unsalted butter (226g), softened
- 1 3/4 cups granulated sugar (350g)
- 4 large eggs, at room temperature
- 1 tablespoon vanilla extract
- 2 1/2 cups all-purpose flour (315g)
- 2 1/2 teaspoons baking powder
- 1/2 teaspoon fine salt
- 1 cup whole milk (240ml), at room temperature
For the chocolate fudge frosting
- 1/2 cup unsalted butter (113g)
- 1/3 cup unsweetened cocoa powder (28g)
- 1/3 cup whole milk (80ml)
- 3 1/2 cups powdered sugar (420g)
- 1 teaspoon vanilla extract
Room temperature eggs and milk matter here; cold ones make the beaten butter seize and the cake heavy. Sift the powdered sugar if it is lumpy.
How to make yellow birthday cake
Bake the cake
- Heat the oven to 350°F (175°C). Butter and flour a 9 by 13 inch pan.
- Beat the 1 cup softened butter and the 1 3/4 cups sugar for 4 minutes, until pale and fluffy.
- Beat in the eggs one at a time, then the tablespoon of vanilla.
- Whisk the flour, baking powder and salt together. Add them to the batter in three parts, alternating with the milk in two parts, mixing on low just until smooth.
- Spread the batter in the pan and bake at 350°F for 30 to 35 minutes, until golden and a toothpick in the center comes out clean. Let the cake cool in the pan for 20 minutes.
Make the frosting and pour it on
- In a saucepan, bring the 1/2 cup butter, the 1/3 cup cocoa and the 1/3 cup milk to a boil over medium heat, stirring.
- Take the pan off the heat and beat in the 3 1/2 cups powdered sugar and the teaspoon of vanilla until smooth and glossy.
- Pour the warm frosting over the still slightly warm cake and spread it to the edges. Let it set for at least 1 hour before cutting into squares.
Tips that make the difference
- Do not shorten the 4 minutes of beating. Set a timer; it is the difference between a light cake and a heavy one.
- Pour the frosting while it is still warm and runny. If it thickens in the pan, warm it for a few seconds over low heat.
- Leave the cake in the pan. A sheet cake frosted in its pan travels to any party without damage.
- Wipe the knife between cuts for clean squares with a shiny top.
Variations
- Layer cake. Bake the batter in two buttered 9 inch round pans for 25 to 30 minutes. Let the frosting cool and thicken for 15 minutes before spreading it between and over the layers.
- Cupcakes. Fill 24 lined muffin cups two-thirds full and bake for 18 to 20 minutes. Dip the tops in the warm frosting.
- Sprinkles. Scatter colored sprinkles over the frosting while it is still wet, the way every child wants it.
- Peanut butter frosting. Beat 1/4 cup creamy peanut butter into the warm frosting with the powdered sugar.
Storage and make-ahead
Cover the pan and keep the cake at room temperature for 3 days. The frosting keeps the top moist.
To freeze, wrap single squares in plastic and foil for up to 2 months; thaw on the counter, still wrapped.
The unfrosted cake can be baked a day ahead, wrapped well, and frosted the next day with fresh warm frosting.
Frequently asked questions
Why does a from-scratch yellow cake taste different from a box?
Real butter in the batter, a longer beating, and no shortening or stabilizers. The crumb is richer and slightly tighter, and it tastes of butter and vanilla instead of sweetness.
Can I use cake flour?
Yes, use 2 3/4 cups cake flour (315g by weight) for an even softer crumb. The rest of the recipe stays the same.
Why did my frosting go grainy?
It cooled too much before the powdered sugar went in, or the sugar was lumpy. Beat it in right off the heat, and sift the sugar first.
Can I make it the day before a birthday?
Yes. Frost it in the pan, cover it, and leave it on the counter overnight. It slices even better the next day.
Beat the butter longer than you think, pour the frosting while it is warm, and let the saucepan go to whoever is having the birthday. That part was never written down, but it is part of the recipe.
Yellow Birthday Cake with Chocolate Fudge Frosting (From Scratch)
The from-scratch yellow sheet cake with cooked chocolate fudge frosting: a buttery 9 by 13 yellow cake, and a frosting of butter, cocoa and milk boiled in a saucepan, beaten with powdered sugar and poured over the warm cake so it sets with a shine. Cups and grams, oven temperature and time.
Ingredients
- 1 cup unsalted butter (226g), softened
- 1 3/4 cups granulated sugar
- 4 large eggs, at room temperature
- 1 tablespoon vanilla extract
- 2 1/2 cups all-purpose flour
- 2 1/2 teaspoons baking powder
- 1/2 teaspoon fine salt
- 1 cup whole milk (240ml), at room temperature
- 1/2 cup unsalted butter
- 1/3 cup unsweetened cocoa powder
- 1/3 cup whole milk
- 3 1/2 cups powdered sugar
- 1 teaspoon vanilla extract
Instructions
- Heat the oven to 350°F (175°C). Butter and flour a 9 by 13 inch pan.
- Beat the 1 cup softened butter and the 1 3/4 cups sugar for 4 minutes, until pale and fluffy.
- Beat in the eggs one at a time, then the tablespoon of vanilla.
- Whisk the flour, baking powder and salt together. Add them to the batter in three parts, alternating with the milk in two parts, mixing on low just until smooth.
- Spread the batter in the pan and bake at 350°F for 30 to 35 minutes, until golden and a toothpick in the center comes out clean. Let the cake cool in the pan for 20 minutes.
- In a saucepan, bring the 1/2 cup butter, the 1/3 cup cocoa and the 1/3 cup milk to a boil over medium heat, stirring.
- Take the pan off the heat and beat in the 3 1/2 cups powdered sugar and the teaspoon of vanilla until smooth and glossy.
- Pour the warm frosting over the still slightly warm cake and spread it to the edges. Let it set for at least 1 hour before cutting into squares.
