Peanut Butter Sheet Cake

Kevin's birthday — forty-one. Same protocol: reverse-seared ribeye, baked potato, beer. The man is consistent. I love consistency. I married consistency. Consistency grills in a parka and eats steak on its birthday and holds your hand on walks and does the dishes without being asked and never, ever deviates from the plan. Some people want excitement. I want a man who wants a steak. I found him. I keep him. I cook him a steak.

The kids' cards: Noah's was a 3D-printed mini-saxophone, which he designed and printed at school. Extraordinary. A functional miniature that actually makes a sound when you blow into it — not a good sound, a sound that suggests a mouse playing jazz, but a sound. Emma painted Kevin a portrait. It was abstract. Kevin said, "Is that me?" Emma said, "It's the essence of you." Kevin said, "My essence has no arms." She said, "Art isn't literal." He framed it. It's in his office. Jack gave Kevin a jar of garden soil and a growth prediction: "Based on current soil conditions, I predict the apple tree will produce its first fruit by fall 2020." Kevin said, "That's a long time." Jack said, "Farming is patience." He's eight. He's lecturing his father about patience.

The garden is in full spring mode — the corn is six inches tall, the tomatoes are flowering, the peas are climbing the trellis, and the watermelon vine is spreading across the mound like it owns the place. Marcus comes over twice a week to check on his watermelon starts and they compare data in the garden journal, two boys with clipboards and measuring tapes and the absolute certainty that they will grow the biggest watermelon in Des Moines.

I made German chocolate cake — Kevin's favorite, the one with the coconut-pecan frosting that requires cooking custard and stirring coconut and which takes about twice as long as a normal frosting but yields about ten times the result. Three layers. The frosting piled thick. Kevin ate two pieces for dinner. For dinner. Again. The man eats cake for dinner on his birthday and I love him for it because it reveals something fundamental: Kevin Holloway is a simple man with simple desires and a wife who bakes. The equation works.

The German chocolate cake took most of the afternoon — custard stirring, coconut toasting, three layers of patience — and if I’m honest, there are years when the occasion calls for something just as celebratory but a little more forgiving of a busy spring Saturday. This peanut butter sheet cake is that cake: the kind Kevin would absolutely eat two pieces of for dinner without apology, the kind the kids finish before the birthday song is done, and the kind that proves you don’t have to spend hours at the stove to make someone feel celebrated. Some birthdays, you make the full production. Some birthdays, you make this.

Prep Time: 20 min | Cook Time: 25 min | Total Time: 45 min | Servings: 24

Ingredients

2 cups all-purpose flour
2 cups granulated sugar
1 teaspoon baking soda
1/2 teaspoon salt
1 cup water
1 cup (2 sticks) butter
1/2 cup creamy peanut butter
2 large eggs, beaten
1/2 cup buttermilk
1 teaspoon vanilla extract
Frosting:
1/2 cup (1 stick) butter
1/2 cup creamy peanut butter
1/3 cup whole milk
3 cups powdered sugar, sifted
1 teaspoon vanilla extract

Instructions

Preheat oven. Heat oven to 350°F. Grease a 15x10-inch jelly roll pan or rimmed baking sheet.
Combine dry ingredients. In a large mixing bowl, whisk together flour, sugar, baking soda, and salt. Set aside.
Make the cake batter. In a medium saucepan over medium heat, combine water, butter, and peanut butter. Bring to a boil, stirring until smooth. Pour hot mixture over the dry ingredients and stir to combine.
Add wet ingredients. Stir in the beaten eggs, buttermilk, and vanilla extract until the batter is smooth and fully incorporated.
Bake. Pour batter into the prepared pan and spread evenly. Bake for 20–25 minutes, or until a toothpick inserted in the center comes out clean.
Make the frosting. About 5 minutes before the cake comes out of the oven, melt butter and peanut butter together in a saucepan over medium heat. Add milk and bring just to a boil. Remove from heat and whisk in powdered sugar and vanilla until smooth.
Frost while warm. Pour the warm frosting over the hot cake straight from the oven. Spread evenly with a spatula. The frosting will set as the cake cools.
Cool and serve. Allow the cake to cool for at least 20 minutes before cutting into squares. Serve directly from the pan.

Nutrition (per serving)

Peanut Butter Sheet Cake — When German Chocolate Takes All Day and You Need a Backup Plan