Years ago, I saw this pin on Pinterest for copycat Costco Muffins. We decided to try the recipe for blueberry muffins but had to make some modifications. I usually only have yellow cake mixes on hand, so we used that instead of a white cake mix. A few years ago, cake mix companies shrunk the size of cake mixes from 18 oz. down to 15 oz. To make up the difference, we increased the flour. Then we added a delicious streusel to the top and our favorite easy blueberry muffins were born.
A couple tips before you start, make sure you rinse the blueberries before you add them to the muffins. Otherwise, you will get green muffins. Trust me on this one. 🙂 Second, this recipe is very easy to make gluten-free. Just use a gluten-free yellow cake mix and gluten-free flour. They taste just like the regular muffins, which doesn’t always happen with gluten-free food.
Blueberry Muffins with Streusel
A Yellow cake mix
1/2 cup flour
1 tsp. baking powder
2/3 cup milk
1/3 cup oil
3 eggs, beaten
1 1/2-2 cups blueberries (fresh or frozen)
Combine cake mix, flour, and baking powder in a bowl. Add eggs, milk, and oil until just combined. Rinse blueberries, pat dry with paper towels, and then carefully fold into batter. If using frozen berries, thaw in microwave for 30 seconds and then rinse. If you skip rinsing, you will have green muffins. 🙂
Preheat oven to 375. Line muffin tins with paper cups or spray with cooking spray. Measure about 1/4 cup of batter into each muffin cup.
Streusel
1/2 cup flour
1/4 cup brown sugar
1/4 cup sugar
3 Tbsp. melted butter
Combine flour and sugars. Stir in melted butter until crumbly. Then sprinkle on top of muffin batter.
Bake at 375 for 18-20 minutes. Makes 16-18 muffins. Yum!
- A Yellow cake mix
- ½ cup flour
- 1 tsp. baking powder
- ⅔ cup milk
- ⅓ cup oil
- 3 eggs, beaten
- 1½-2 cups blueberries (fresh or frozen)
- Streusel:
- ½ cup flour
- ¼ cup brown sugar
- ¼ cup sugar
- 3 Tbsp. melted butter
- Combine cake mix, flour, and baking powder in a bowl.
- Add eggs, milk, and oil until just combined.
- Rinse blueberries, pat dry with paper towels, and then carefully fold into batter. If using frozen berries, thaw in microwave for 30 seconds and then rinse.
- Preheat oven to 375.
- Line muffin tins with paper cups or spray with cooking spray.
- Measure about ¼ cup of batter into each muffin cup.
- For streusel, combine flour and sugars. Stir in melted butter until crumbly. Then sprinkle on top of muffin batter.
- Bake at 375 for 18-20 minutes.
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Yum! I am totally making these this weekend! My family has a strange tradition where we have blueberry muffins with beef stew and I am going to try this one out! 😀 Thanks for the recipe!
All I can saw is WOW, I used this recipe as a baseline amazing recipe! I swapped out the blueberries for strawberries, and rosewater, and added pistachios to the Streusel. They turned out amazing
I’m so glad you enjoyed them and made the recipe your own! I’ll have to try it with strawberries!
I made these lemon blueberry muffins and they turned out amazing! All I added was 2 tsp of lemon extract. They were a huge hit! Thanks so much for the recipe!
That sounds amazing! Glad they turned out so good!
Delicious and easy muffins!
I have made them twice and I wouldnt change a thing–great way to use those cake mixes bought on sale. Nice rise and tender too.!
Tried the cake mix blueberry muffins. They were a big hit with my family and rosary group.
Love to hear that they were a hit! Thank you for visiting my blog!
Husband said best ever! We didn’t do the topping.
Glad you enjoyed them!
Just popped these in the oven! The batter was light and fluffy. I used white cake and added lemon extract and coconut milk. All I had on hand. The kids are drinking all the milk these days…no complaints. But I cannot wait to put some butter on these with my California OJ fresh from the tree! Thank you for a delightful morning of baking and relaxing!
Sounds amazing! Thank you for trying them and I hope they turned out great!
These were delicious but I must admit I added a few more blueberries. I am definitely making this my go to .thank you for sharing.
What to do if the cake mix has pudding in it???
I think that a cake mix with pudding should be fine to use. Hopefully they turn out great!