Costco Muffins - Copycat

Total Time
10 mins
20 mins

Found on the net and posted so that it will be easier to find when folks ask for the recipe! Prep times are guess-timates.

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  • 1 (18 ounce) box cake mix, package (Duncan Hines is the best)
  • 2 tablespoons flour
  • 3 eggs
  • 23 cup milk
  • 13 cup vegetable oil
  • 1 teaspoon baking powder


  1. Mix all ingredients together.
  2. Spoon into prepared muffin cups.
  3. Bake at 375 for approximately 20 minutes or until tops are lightly browned.
  4. For ALMOND POPPYSEED MUFFINS: use a white cake mix, add 2 teaspoons poppyseeds, and 1 tsp almond extract.
  5. FOR CHOCOLATE MUFFINS: use a chocolate cake mix and stir in 1 1/2 cup chocolate chips.
  6. Create your own: use whatever flavor cake mix you want and add your own goodies.
  7. Other suggestions:.
  8. + French vanilla cake mix and fresh raspberries.
  9. + Lemon cake mix and poppyseed.
  10. + Spice cake mix with cinnamon/sugar topping.
Most Helpful

4 5

I didn't really think these tasted much like Costco muffins...they were a little more cupcake-y than costco's are...I might try them with a touch more oil to try to get closer. BUT I am definitely going to keep this recipe around for the fact that it's EASY and VERSATILE!

4 5

My kids really liked these. I added 2 tsp. of vanilla and milk chocolate chips to the batter. Everyone said they tasted more like a cupcake than a muffin. Thanks for an easy recipe.

3 5

The muffins came out good, but they didn't taste anything like Costco muffins to me. I used a Duncan Heinz Spice Cake mix, and cut up an apple to put in the batter, to simulate Costco's apple-cinnamon muffins. Not even close. Definitely not the best cupcake I've made either, but not bad. I think without the apples, it would have been really dry.