Costco Double Chocolate Muffin Recipe

This Costco Double Chocolate Muffin Recipe is a rich and moist recipe, which is made with cocoa powder and semi-sweet chocolate chips. It’s the perfect breakfast treat, ready in about 40 minutes.

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Costco Double Chocolate Muffin Recipe Ingredients

• 1 3/4 cups all-purpose flour
• 2/3 cup unsweetened cocoa powder
• 1 Tbsp. baking powder
• 1 tsp. baking soda
• 1 tsp. salt
• 1 tsp. espresso powder (optional)
• ½ cup unsalted butter, melted and slightly cooled
• 1 ¼ cup granulated sugar
• 2 large eggs, room temperature
• 2 tsp. vanilla extract
• 3/4 cup buttermilk, room temperature
• 1/2 cup sour cream, room temperature
• 2 cups semi-sweet chocolate chips, divided

How To Make Costco Double Chocolate Muffins

1. Prepare Oven and Pan: Preheat the oven to 425°F. Line a 6-count jumbo muffin pan with jumbo paper liners.
2. Whisk Dry Ingredients: In a medium-sized mixing bowl, whisk together the flour, cocoa powder, baking powder, baking soda, salt, and optional espresso powder until well combined.
3. Mix Wet Ingredients: In a separate large mixing bowl, whisk the slightly cooled melted butter and sugar together. Add the eggs one at a time, mixing well after each, followed by the vanilla extract. Whisk in the room-temperature sour cream and buttermilk until smooth.
4. Combine Batter and Add Chocolate: Gently fold the dry ingredients into the wet ingredients with a spatula until just combined. Be careful not to overmix. Reserve ½ cup of the chocolate chips for the topping, and fold the remaining 1 ½ cups into the batter. Let the batter rest at room temperature for 10-15 minutes.
5. Fill and Top Muffins: Divide the thick batter evenly among the prepared jumbo muffin cups. Top the muffins with the reserved ½ cup of chocolate chips.
6. Bake the Muffins: Bake at 425°F for 5 minutes. Then, without opening the oven door, reduce the oven temperature to 350°F and continue to bake for another 19 to 25 minutes. The muffins are done when a toothpick inserted into the center comes out with a few moist crumbs attached.
7. Cool and Serve: Let the muffins cool in the pan for a few minutes before transferring them to a wire rack to enjoy.

Recipe Tips

• How do I get a super moist muffin? The combination of buttermilk, sour cream, and oil is the secret to an ultra-moist crumb that tastes just like the bakery version. Using room temperature ingredients also helps everything combine properly for the best texture.
• Why use two different oven temperatures? The initial high heat of 425°F causes the muffins to rise rapidly, creating that big, beautiful bakery-style dome. Reducing the heat to 350°F then allows the inside of the muffin to cook through perfectly without the outside burning.
• What does the espresso powder do? The small amount of optional espresso powder will not make your muffins taste like coffee. Instead, it enhances and deepens the flavor of the chocolate, making them taste even richer and more decadent.
• How do I avoid a tough muffin? The most important rule is not to overmix the batter. Once you combine the wet and dry ingredients, fold them together gently with a spatula only until you no longer see streaks of flour. A few lumps are perfectly fine.

What To Serve With Costco Double Chocolate Muffins

These rich, jumbo muffins are a decadent breakfast or dessert on their own, but they are also perfect with:

• A tall glass of cold milk.
• A hot cup of black coffee or an espresso.
• A side of fresh raspberries or strawberries to cut the richness.

How To Store Costco Double Chocolate Muffins

Room Temperature: Store completely cooled muffins in an airtight container for 2 to 3 days. Refrigerated: To extend their freshness, store them in an airtight container in the refrigerator for up to 1 week. Frozen: These muffins freeze very well. Wrap each muffin tightly in plastic wrap and store them in a freezer-safe bag for 2 to 3 months. Thaw at room temperature or warm gently in the microwave.

Costco Double Chocolate Muffins Nutrition Facts

• Calories: 793kcal
• Protein: 14g
• Fat: 33g
• Carbohydrates: 116g
• Sugar: 67g

Nutrition information is estimated and may vary based on ingredients and cooking methods used.

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