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High-Altitude Yellow Cupcakes with Rich Chocolate Buttercream

These high-altitude yellow cupcakes are adapted for baking above 4,500 feet so you get light, domed, and tender cupcakes every time. They’re scented with plenty of vanilla and finished with a fudgy chocolate buttercream for a classic birthday-cake flavor.

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 post is dedicated to my Grammy Gail. A few days after she passed in 2016, I created this recipe to honor her memory. I have fond memories of visiting her ranch in Washoe, Nevada, riding horses, and sharing big, comforting meals she happily cooked for family and friends.

Grammy loved Native American history, archaeological digs around Nevada, and caring for animals—especially horses and greyhounds. She was quiet, sharp-witted, and full of sass, and she taught me to never take no for an answer. This yellow-cupcake recipe was her favorite, so I’m sharing the version I developed in pastry school and later adjusted for high-altitude baking.

The ingredient list

A variety of white and grey bowls filled with baking ingredients like flour, butter, sugar, eggs, cocoa powder, sour cream, and milk on a grey speckled counter.

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

Bake the cupcakes

A silver bowl of creamed butter and sugar on a marble counter.
Beat the butter and sugar until pale 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.
Stir in the sour cream and scrape down the bowl for an even batter.
A silver bowl of batter and flour on a white counter.
Alternate adding the flour mixture and milk in two batches.
A silver bowl of batter for high altitude yellow cupcakes.
Mix just until combined—don’t overmix, or cupcakes may be dense.
Rows of high altitude yellow cupcakes on a wire rack.
Divide batter into liners and bake until a toothpick shows a few moist crumbs.

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 until smooth.
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 cupcakes

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

Make a layer cake

You can use this batter to bake a 3-layer 6-inch cake instead of cupcakes. Grease and line the pans, divide the batter evenly, and bake at 375°F for 18–21 minutes. Cool completely before removing from the pans.

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.

If you make this recipe, please leave a star rating and review—I read every comment and love hearing your feedback. Thank you for supporting Sunday Table!

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 recipe is adjusted for 4,500 feet elevation so the cupcakes turn out fluffy, soft, and pretty. They’re finished with a light, fudgy chocolate buttercream for a delicious, timeless 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

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

Chocolate Buttercream

  1. Beat butter until fluffy. Add powdered sugar 1 cup at a time until the mixture comes together.
  2. Mix in cocoa powder until the frosting is thick. Add a pinch of salt and the milk or cream 1 tablespoon at a time until you reach the desired consistency.
  3. Whip the buttercream 5–6 minutes until light and airy. Pipe or spread onto cooled cupcakes and decorate as desired.

Notes

Measure flour by fluffing it, spooning into a cup, and leveling—do not pack. Avoid overmixing the batter, especially at high altitude; extra mixing adds air that can cause collapse. Minimize opening the oven while cupcakes rise. Bake until just done to avoid drying; remove when a toothpick shows a few moist crumbs. If cupcakes sink in the center at higher elevations, reduce the baking powder and baking soda by 1/8 teaspoon as needed.

Cuisine: American
Course: Dessert
Author: Sara Lynn Hunt Broka
Serving: 1 cupcake
Calories: 289 kcal
Carbohydrates: 41.7 g
Protein: 2.5 g
Fat: 13.1 g

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