Discover the ultimate Jumbo Blueberry Muffin recipe! 🎉 These giant bakery style muffins are loaded to the brim with juicy blueberries in a deliciously sweet and tender-crumbed package. Adorned with sparkling sugar, these Costco-inspired giant muffins are the perfect way to start any day.

About these bakery style blueberry muffins

Before we moved to our current house, I used to frequent Costco. Now it’s over an hour away! 😢 And of all the many cost-saving, oversized things I loved, their giant blueberry muffins were always my favorite. As such, I’ve spent—no joke—a full year trying to nail a copycat recipe, and y’all" I’ve finally cracked the code.

Perfectly sweet, soft, lightly spiced, and with a crunchy sugar topping that’ll make you go gaga. Enough juicy blueberries that you’ll get some in every bite. And did I mention that these bakery-style blueberry muffins are ginormous" Costco would be so proud.
This huge blueberry muffin recipe is simply made with primarily pantry staples and takes just 15 minutes of prep. As a 2-person household, I designed it to make a more reasonable 8 muffins instead of 12—I call it the baker’s half dozen. And, since it’s my birthday, I get 4 of these fluffy bad boys and my family can split the other 4. The way I see it, they’re lucky I’m sharing them at all!  😂🤷‍♀️

So if you, too, have ...