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Costco Double Chocolate Muffins Recipe


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3.8 from 20 reviews

  • Author: Ava
  • Total Time: 40 minutes
  • Yield: 12 jumbo muffins

Description

Deliciously rich and moist Costco-style Double Chocolate Muffins made with devil’s food cake mix, instant chocolate fudge pudding, and plenty of semisweet chocolate chips. These jumbo muffins have a perfect balance of chocolate flavor and a tender crumb, ideal for breakfast treats or satisfying dessert cravings.


Ingredients

Wet Ingredients

  • 3 large eggs
  • 1/2 cup vegetable oil
  • 1/2 cup milk
  • 1/4 cup water
  • 1 teaspoon vanilla extract
  • 1 cup sour cream (or plain Greek yogurt)

Dry Ingredients

  • 1 box Devil’s food cake mix (about 15.25 oz)
  • 3.9 ounce box instant chocolate fudge pudding mix
  • 1/2 teaspoon cinnamon

Chocolate Chips

  • 2 1/2 cups semisweet chocolate chips (divided use: 2 cups for batter, 1/2 cup for topping)


Instructions

  1. Preheat Oven: Preheat your oven to 375°F (190°C) to ensure it’s at the right temperature for baking the muffins evenly.
  2. Prepare Muffin Tins: Line two jumbo 6-cup muffin tins with jumbo cupcake liners or spray them with nonstick cooking spray. Note that most jumbo muffin pans have 6 wells, so two batches will make 12 muffins.
  3. Mix Wet Ingredients: In a large bowl, use an electric or stand mixer to beat together the 3 eggs, 1/2 cup oil, 1/2 cup milk, 1/4 cup water, and 1 teaspoon vanilla extract until well combined.
  4. Add Sour Cream: Stir in 1 cup sour cream (or plain Greek yogurt) until the mixture is smooth and well blended.
  5. Add Dry Ingredients: Add the box of Devil’s food cake mix, instant chocolate fudge pudding mix, and 1/2 teaspoon cinnamon to the wet ingredients.
  6. Combine Batter: Mix on low speed at first to prevent dry ingredients from flying out of the bowl, then increase speed and stir until well combined with no lumps.
  7. Fold in Chocolate Chips: Stir in 2 cups of semisweet chocolate chips evenly into the batter.
  8. Fill Muffin Cups: Using a spring-loaded cookie scoop or spoon, fill each lined muffin cup about 3/4 full with batter for perfectly sized jumbo muffins.
  9. Top with Chocolate Chips: Sprinkle the remaining 1/2 cup of semisweet chocolate chips on top of each muffin for a nice melty, chocolaty finish.
  10. Bake Muffins: Place muffin pans on the middle oven rack and bake for 20-25 minutes or until a toothpick inserted in the center comes out clean. Baking times can vary, so check for doneness starting at 20 minutes.

Notes

  • Most jumbo muffin pans have 6 wells; bake in two batches for 12 muffins total.
  • You can substitute sour cream with plain Greek yogurt to add protein and tanginess.
  • Make sure to not overmix the batter to keep muffins tender.
  • Use a toothpick to test doneness instead of relying strictly on time.
  • Feel free to adjust the quantity of chocolate chips to your preference.
  • Prep Time: 15 minutes
  • Cook Time: 20-25 minutes
  • Category: Baking
  • Method: Baking
  • Cuisine: American