How to Make the Iconic Costco Coffee Cake Muffin at Home: Soft, Cinnamon-Rich Coffee-Perfected (Costco Coffee Cake Muffin Recipe)

The beloved Costco coffee cake muffin is more than just another bakery item-it’s a supersized, cinnamon-streusel-topped legend. Oversized yet airy, sweet but balanced, these muffins disappeared from bakery shelves... but now you can recreate them at home.

This Costco coffee cake muffin recipe delivers the same light interior, sugary crunch, and cinnamon swirl. But we take it further-enhancing it with Bazan Coffee to create not just a muffin, but a morning ritual.

What Makes Costco’s Muffins So Iconic?

• Large dome top with crumbly cinnamon streusel
  

• Moist, cake-like crumb (thanks to oil + buttermilk)
  

• A cinnamon-sugar ribbon running through the center
  

• Subtle bakery-style flavor that pairs perfectly with bold coffee
  

According to home bakers on Reddit and industry bakers, replicating this texture requires balancing fat, leavening, and moisture-all of which are dialed in here.

Ingredient Breakdown (Costco Copycat + Bazan Coffee Upgrade)

For the Muffin Batter:

• 2 cups all-purpose flour
  

• 1 tsp baking powder
  

• ½ tsp baking soda
  

• ½ tsp salt
  

• 1 tsp ground cinnamon
  

• ½ cup granulated sugar
  

• ½ cup brown sugar
  

• ½ cup vegetable oil
  

• 2 large eggs
  

• ¾ cup buttermilk (or sour cream)
  

• ¼ cup strong brewed Bazan Coffee (Cau Dat Arabica or Special Vietnam Blend)
  

• 1 tsp vanilla extract
  

For the Cinnamon Swirl:

• ⅓ cup brown sugar
  

• 1 tbsp cinnamon
  

• 1 tsp finely ground Bazan Coffee (optional-but incredible for mocha warmth)
  

For the Crumb Topping:

• ½ cup flour
  

• ¼ cup brown sugar
  

• 1 tsp cinnamon
  

• 4 tbsp cold butter, cut into cubes
  

Step-by-Step: Costco Coffee Cake Muffin Recipe

Step 1: Brew the Coffee

Use Bazan’s Special Vietnam Blend for balanced depth, or Cau Dat Arabica for a brighter note.
 Let it cool completely-hot coffee may curdle dairy ingredients.

Step 2: Prepare the Streusel

• Combine flour, brown sugar, and cinnamon.
  

• Cut in cold butter using a fork or fingers until crumbly.
  

• Chill while you make the batter.
  

Step 3: Mix the Muffin Batter

1. Preheat oven to 375°F (190°C). Line or grease a jumbo muffin tin (for full Costco effect).
   

2. Whisk dry ingredients: flour, baking powder, baking soda, salt, cinnamon.
   

3. In a separate bowl, whisk sugars, oil, and eggs until smooth.
   

4. Add buttermilk, vanilla, and cooled brewed coffee.
   

5. Fold in dry ingredients gently. Do not overmix.
   

Step 4: Layer and Swirl

• Fill each muffin cup halfway.
  

• Spoon 1 tsp of cinnamon swirl into each and lightly swirl with a toothpick.
  

• Top with remaining batter and sprinkle with streusel.
  

Step 5: Bake

• Bake for 22–26 minutes, or until tops are golden and a toothpick comes out clean.
  

• Let cool in pan for 10 minutes before removing.
  

Brewed coffee contributes to browning acceleration and flavor complexity in baked goods when used in moist batters.

FAQs: Costco Coffee Cake Muffin Recipe

Can I use decaf coffee?

Absolutely.
Use freshly brewed decaf coffee if avoiding caffeine. The flavor impact remains.

What if I don’t have buttermilk?

You can substitute with:

• ¾ cup full-fat Greek yogurt + 2 tbsp milk
  

• ¾ cup milk + 1 tbsp lemon juice (let sit 5 minutes)
  

Can I make mini or standard muffins?

Yes!

• Standard size: Bake 16–18 minutes.
  

• Mini muffins: Bake 10–12 minutes.
  

Why add brewed coffee to muffins?

• Adds complexity, bitterness, and moisture.
  

• Balances the sweetness of brown sugar and streusel.
  

In cinnamon-based recipes, brewed Arabica deepens aroma while reducing perceived sweetness, enhancing pairing potential.

Best Bazan Coffees for These Muffins

Pro Baking Tips

• Use room temperature ingredients to prevent curdling.
  

• Let coffee cool before mixing into batter.
  

• Avoid overmixing, or muffins will be dense.
  

• For extra crunch, add a pinch of rolled oats to the streusel.
  

Bake the Muffin Costco Should Never Have Discontinued

This Costco coffee cake muffin recipe doesn’t just replicate a bakery classic-it reinvents it with better balance, specialty coffee, and homemade warmth.

With:

• Buttermilk-based softness
  

• A rich cinnamon swirl
  

• Brewed Bazan Coffee for signature depth
  

…you’ll have a muffin that’s better than store-bought and baked with intention.

Bake Bigger. Brew Better. Choose Bazan Coffee.

Explore Bazan’s finest roasts for all your breakfast pairings:

• Cau Dat Arabica – Light and elegant
  

• Special Vietnam Blend – Balanced for all-day sipping
  

• Fine Robusta – Krong Năng – Great for bold brews and BBQ rubs
  

Muffin mornings are better with Bazan.

Brew It with Too Strong: Vietnam’s Bold Robusta

Too Strong is 100% Vietnamese Robusta from Đắk Lắk, dark roasted to stand up to milk and ice. It carries roughly twice the caffeine of a typical arabica blend (about 2.2–2.7%), with notes of chocolate, caramel and warm toast and none of the burnt, bitter bite.

• Made for milk: built for cà phê sữa đá, lattes and iced coffee.
• Brew it your way: phin filter, espresso machine, French press or paper filter.
• Fresh from the farm: roasted date printed on every bag.

Shop Too Strong Dark Roast →