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double chocolate chunk muffins on a metal tray
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Double Chocolate Chunk Muffins (Costco Copycat)

These double chocolate chunk muffins are a pretty spot on copy cat of the Kirkland chocolate muffins from Costco. These muffins are ultra rich, chocolatey, and the perfect way for anyone with a sweet tooth to start the day!
Prep Time15 minutes
Cook Time20 minutes
Total Time35 minutes
Course: Breakfast, Brunch, Dessert
Cuisine: American
Servings: 12
Calories: 520kcal

Ingredients

  • 3 eggs
  • 1/2 cup oil
  • 1/2 cup milk
  • 1/4 cup water
  • 1 teaspoon vanilla
  • 1 cup sour cream can substitute plain Greek yogurt
  • 1 15.25 ounce Devil’s food cake mix
  • 1 3.9 ounce package instant chocolate fudge pudding
  • 1/2 teaspoon cinnamon
  • 2 1/2 cups semisweet chocolate chips divided

Instructions

  • Preheat your oven to 375 degrees.
  • Line 12 jumbo muffin tins with jumbo liners.
  • In a large bowl using an electric mixer combine the eggs, oil, milk, water and vanilla.
    3 eggs, 1/2 cup oil, 1/2 cup milk, 1/4 cup water, 1 teaspoon vanilla
  • Next whip in the sour cream.
    1 cup sour cream
  • Using a spoon add the cake mix, dry pudding mix and cinnamon.
    1 15.25 ounce Devil’s food cake mix, 1 3.9 ounce package instant chocolate fudge pudding, 1/2 teaspoon cinnamon
  • Stir until well combined.
  • Stir in 2 cups of chocolate chips.
    2 1/2 cups semisweet chocolate chips divided
  • Fill the lined muffin tins and top with the remaining chocolate chips.
  • Bake for 20-25 minutes until a toothpick comes out clean.

Notes

  • You can use any chocolate cake mix you like if you don't have devil's food cake.
  • The cinnamon is what gives the muffins their Costco copycat taste so don't omit it.
  • You can make these in a regular or mini muffin tin instead of a jumbo one. Just make sure you adjust the cooking time down to accommodate for the size.

Nutrition

Calories: 520kcal | Carbohydrates: 60g | Protein: 5g | Fat: 31g | Saturated Fat: 11g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 10g | Trans Fat: 0.04g | Cholesterol: 53mg | Sodium: 455mg | Potassium: 303mg | Fiber: 1g | Sugar: 43g | Vitamin A: 197IU | Vitamin C: 0.2mg | Calcium: 121mg | Iron: 2mg