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High-Altitude Yellow Cupcakes with Silky Chocolate Buttercream

These high-altitude yellow cupcakes are adapted for baking above 4,500 feet so you get light, tender cupcakes every time. Rich in vanilla and finished with a fudgy chocolate buttercream, they make a classic birthday treat or a comforting dessert any time.

A closeup side image of a marble and wood board topped with high altitude yellow cupcakes with chocolate buttercream on a grey table next to a glass of milk, grey bowl of frosting, and grey vase with dried eucalyptus leaves.

This recipe is dedicated to my Grammy Gail. A few days after she passed in 2016 I created this version to honor her. I have fond memories of visiting her ranch in Washoe, Nevada, riding horses, and gathering around her generous meals. She loved Native American history and archaeology, adored animals—especially horses and greyhounds—and had a quietly sharp sense of humor. This yellow cupcake was one of her favorites, so I’ve adapted the recipe I first developed in pastry school to perform reliably at high elevation.

The ingredient list is straightforward and pantry-friendly. For the cupcakes you’ll need all-purpose flour, cornstarch, baking powder, baking soda, Kosher salt, unsalted butter, granulated sugar, eggs, pure vanilla extract, sour cream, and whole milk. For the chocolate buttercream you’ll need unsalted butter, Dutch-process cocoa powder, powdered sugar, whole milk or cream, and a pinch of salt. Optional garnishes include cacao nibs or sprinkles.

Bake the cupcakes

A silver bowl of creamed butter and sugar on a marble counter.
Beat butter and sugar until pale yellow and fluffy, about 3–4 minutes.
A silver bowl of butter, sugar, eggs, and vanilla.
Add eggs one at a time, then vanilla; mix until smooth.
A silver bowl of butter, sugar, eggs, and sour cream on a marble table.
Add sour cream and scrape the bowl to ensure an even batter.
A silver bowl of batter and flour on a white counter.
Add the flour mixture and milk in two additions, mixing just until combined.
A silver bowl of batter for high altitude yellow cupcakes.
Avoid overmixing to keep the cupcakes tender.
Rows of high altitude yellow cupcakes on a wire rack.
Divide the batter among liners and bake until just set.

Chocolate buttercream

A silver bowl of butter and powdered sugar on a white counter.
Beat butter and powdered sugar until light and fluffy.
A silver bowl of frosting & cocoa powder.
Add cocoa, a pinch of salt, and milk or cream to reach desired texture.
A hand holding a whipping attachment covered in chocolate buttercream.
Whip until fluffy, then pipe or spread onto cooled cupcakes.
A side image of a marble and wood tray of high altitude yellow cupcakes with chocolate buttercream on a grey table next to a grey bowl of frosting, white bowl of cacao nibs, white vase with brown blossoms, and cup of milk.

Storing and freezing

Store frosted cupcakes in an airtight container at room temperature for up to 3 days. To freeze unfrosted cupcakes, arrange them in a freezer-safe container, separating layers with parchment if stacking, and freeze for up to 1 month. Thaw for about 1 hour before frosting.

Make a layer cake

This batter also works for a 3-layer 6-inch cake. Grease pans and line with parchment, divide batter evenly, and bake at 375°F for 18–21 minutes. Cool completely before removing from pans and assembling.

A closeup side image of high altitude yellow cupcakes with chocolate buttercream on a marble and wood cake stand next to a grey vase with blossoms, a glass of milk, a grey bowl of frosting, and a white bowl of cacao nibs with a grey background.

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A very closeup image of high altitude yellow cupcakes with chocolate buttercream on a marble cake stand with a grey background.

High Altitude Yellow Cupcakes with Chocolate Buttercream

Yield: 24 cupcakes
Prep Time: 25 mins
Cook Time: 15 mins
Total Time: 40 mins
Inspired by the classic birthday cake, this high-altitude version is adjusted for 4,500 feet so cupcakes come out fluffy and soft. Topped with a fudgy chocolate buttercream, they’re a dependable, delicious treat.

Ingredients

High Altitude Yellow Cupcakes

  • 2 1/4 cups all-purpose flour
  • 2 Tablespoons cornstarch
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 3/4 teaspoon Kosher salt
  • 1/2 cup unsalted butter, softened
  • 1 1/4 cups granulated sugar
  • 2 large eggs, room temperature
  • 1 Tablespoon pure vanilla extract
  • 1/2 cup sour cream
  • 1 cup whole milk

Chocolate Buttercream

  • 1 cup unsalted butter, softened
  • 3–4 cups powdered sugar, sifted
  • 1/2 cup Dutch-process cocoa powder, sifted
  • Kosher salt, to taste
  • 2 Tablespoons whole milk or cream, plus more as needed
  • Cacao nibs, sprinkles, etc., for decorating (optional)

Instructions

High Altitude Yellow Cupcakes

  • Preheat oven to 375°F. Line two cupcake pans with paper liners.
  • Whisk together flour, cornstarch, baking powder, baking soda, and salt in a small bowl; set aside.
  • In a large bowl, beat butter and sugar until pale and fluffy, about 3–4 minutes. Add eggs one at a time, then mix in vanilla and sour cream, scraping the bowl as needed.
  • Stir in half the flour mixture, then half the milk. Repeat with remaining flour and milk, mixing just until combined. Do not overmix.
  • Divide batter evenly among 24 liners (about 2/3 full). Bake 12–14 minutes, or until a toothpick shows a few moist crumbs. Let cool in pan briefly, then transfer to a rack to cool completely before frosting.

Chocolate Buttercream

  • Beat butter until fluffy. Add powdered sugar 1 cup at a time until the mixture comes together.
  • Add cocoa powder, a pinch of salt, then add milk or cream 1 tablespoon at a time until smooth and the desired consistency is reached.
  • Whip the buttercream 5–6 minutes until light and airy. Pipe or spread onto cooled cupcakes and decorate as desired.

Notes

Fluff flour with a whisk, spoon into the measuring cup, and level—don’t pack it in.

Do not overmix batter. At high altitude extra air causes rapid rise and possible collapse; mix only until ingredients are incorporated.

Avoid opening the oven while the cupcakes are rising; a sudden temperature drop can affect their rise, which is especially noticeable at altitude.

Bake until just done. Remove when a toothpick shows a few moist crumbs because overbaking dries cakes easily at high elevations.

If cupcakes sink in the center at your elevation, you may need to reduce baking powder and baking soda by 1/8 teaspoon for even higher altitudes.

Cuisine: American
Course: Dessert
Author: Sara Lynn Hunt Broka
Serving: 1cupcake, Calories: 289kcal