Costco Muffins Copycat

Recreate the bakery magic of everyone's favorite supersized treats with this Costco Muffins Copycat recipe! These jumbo muffins are irresistibly moist, thanks to a blend of whole milk, vegetable oil, and just the right amount of eggs, while a generous dose of vanilla extract enhances their rich flavor. Customize your batch with your favorite mix-ins—like gooey chocolate chips, juicy blueberries, or crunchy nuts—to make them truly your own. With only 15 minutes of prep time and a reliable rise in the oven, these muffins deliver those signature bakery-style domes that feel indulgent with every bite. Perfect for breakfast on-the-go, brunch, or satisfying your sweet tooth, this recipe yields 12 crowd-pleasing muffins that taste like they came straight from Costco's iconic bakery aisle!

Nutriscore Rating: 49/100

Prep Time:15 mins

Cook Time:28 mins

Total Time:43 mins

Servings: 12

Ingredients

• 4 cups All-purpose flour
• 2 cups Granulated sugar
• 1 tablespoon Baking powder
• 1 teaspoon Baking soda
• 1 teaspoon Salt
• 4 large Eggs
• 1 cup Vegetable oil
• 1.5 cups Whole milk
• 2 teaspoons Vanilla extract
• 2 cups Add-ins (chocolate chips, blueberries, or chopped nuts)

Directions

Step 1

Preheat your oven to 375°F (190°C) and grease or line a jumbo muffin tin with paper liners.

Step 2

In a large mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until well combined.

Step 3

In a separate bowl, beat the eggs, then add in the vegetable oil, milk, and vanilla extract. Mix until fully integrated.

Step 4

Pour the wet ingredients into the dry ingredients, stirring gently until just combined. Be careful not to overmix; the batter should be slightly lumpy.

Step 5

Fold in your chosen add-ins (such as chocolate chips, blueberries, or nuts) with a spatula until evenly distributed in the batter.

Step 6

Scoop the batter into the prepared muffin tin, filling each cup almost to the top to achieve that signature jumbo muffin dome.

Step 7

Bake in the preheated oven for 25-28 minutes, or until a toothpick inserted into the center of a muffin comes out clean.

Step 8

Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely before serving.

Nutrition Facts

Serving size	(2182.8g)

Amount per serving	% Daily Value*
Calories	7852.1

Total Fat 372.5g	0%
Saturated Fat 123.6g	0%
Polyunsaturated Fat 134.8g
Cholesterol 787.9mg	0%
Sodium 5557.4mg	0%
Total Carbohydrate 1048.1g	0%
Dietary Fiber 45.1g	0%
Total Sugars 612.4g
Protein 118.7g	0%

Vitamin D 325.0IU	0%
Calcium 948.7mg	0%
Iron 41.8mg	0%
Potassium 2637.6mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 41.8%

Protein: 5.9%

Carbs: 52.3%