Y’all, it is officially BIRTHDAY BAKE WEEK over here, and I cannot believe I waited this long to share these muffins with you. We are talking buttery, fluffy, golden-domed birthday cake muffins loaded with sprinkles and topped with the most ridiculous sprinkle streusel crumble. They taste like the love child of a funfetti cake and your favorite bakery muffin, and they have been on repeat in my kitchen all week.
I am doing a whole week of birthday cake inspired recipes to celebrate MY birthday, and let me just say, this one might be my favorite of the bunch. I love a good birthday home café moment in the morning, and these muffins are basically a celebration in muffin form. They turn a regular Tuesday morning into something special, and that is exactly the energy we are bringing into this birthday season.
Sprinkles just make everything better. That is a fact, this is the law, I do not make the rules. These muffins are absolutely no exception. They are SO easy to throw together, they bake up with that picture perfect bakery dome, and they taste like you absolutely splurged on something fancy from the cute place downtown. Except you didn’t. You made them in your own kitchen, in about 35 minutes, probably in your pajamas.
P.S. Please please please use jimmies (the long skinny sprinkles) and NOT nonpareils (the little round balls) in the batter. The round ones bleed their color into the dough and you’ll end up with weirdly tinted gray muffins. Trust me on this one!
Ingredients Needed
Unsalted Butter Melted butter gives these muffins their rich, tender crumb and that classic bakery flavor. Make sure it is fully melted but not hot, or it will scramble your eggs when you mix everything together. We use it in both the muffin batter and the streusel topping.
Granulated Sugar This sweetens the muffins and helps create that gorgeous golden top when they bake. It also tenderizes the crumb so the muffins stay soft for days. The streusel uses sugar too, which gives the topping that sweet, almost crunchy bite.
Large Eggs The eggs are the structure here. They bind everything together and help the muffins rise tall in the oven. Make sure they are at room temperature so they incorporate smoothly into the batter.
Vanilla Extract Classic warm vanilla flavor that rounds everything out and makes these taste like real bakery muffins. Do not skip it!
Cake Batter Extract This is the SECRET WEAPON. It is what gives these muffins that unmistakable birthday cake flavor, like the box mix you grew up loving but better. You can find it on Amazon or at Michael’s, and I promise it is worth tracking down.
Sour Cream Adds incredible moisture and a subtle tang that keeps these muffins from tasting one note sweet. It also makes the crumb extra soft and tender. Full fat is best here.
Whole Milk Loosens the batter to the perfect scoopable consistency and adds extra moisture. Whole milk gives the richest result, but 2% works in a pinch.
All-Purpose Flour The main structure of the muffins. Make sure to spoon and level when measuring so you don’t end up with dense, dry muffins. We use flour in the streusel too for that buttery crumble texture.
Baking Powder This is what gives us the LIFT. It is the whole reason these muffins climb up out of the pan into that dreamy bakery dome. Make sure yours is fresh, because old baking powder equals flat sad muffins.
Salt A little salt balances out all the sweetness and makes every other flavor pop. Never skip salt in a sweet recipe!
Rainbow Sprinkles The whole vibe of the recipe. Use jimmies (the long skinny ones) so they hold their color and don’t bleed into the batter. We use them in the muffins AND the streusel for maximum birthday cake energy.
Substitutions and Modifications
- No cake batter extract? Use almond extract or just double the vanilla. Different vibe but still delicious.
- No sour cream? Full fat Greek yogurt is a perfect 1:1 swap.
- No whole milk? 2% milk, buttermilk, or even half and half all work great.
- Want to make them mini? Use a mini muffin pan and bake at 400 for 6 minutes, then 350 for about 5 to 6 more. Keep an eye on them.
- Make them gluten free by swapping in a 1:1 gluten free flour blend like King Arthur or Bob’s Red Mill.
Why You’ll Love This Recipe
- They taste like birthday cake but are 100% breakfast appropriate, which is honestly the dream
- The two-temperature bake gives you the most beautiful tall bakery-style dome EVERY single time
- They come together in one bowl in about 15 minutes with ingredients you probably already have
Equipment Needed
- 12-cup muffin pan
- Muffin liners (or grease the pan)
- Large mixing bowl
- Medium bowl for the streusel
- Whisk
- Rubber spatula
- Measuring cups and spoons
- Cookie scoop or large spoon
- Wire cooling rack
Birthday Cake Crumble Muffins with Sprinkle Streusel
Ingredients
For the Muffins
- ½ cup unsalted butter melted
- 1 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 teaspoon cake batter extract
- â…“ cup sour cream
- â…“ cup whole milk
- 1 ¾ cups all-purpose flour
- 1 ½ teaspoons baking powder
- ¼ teaspoon salt
- ¾ cup rainbow sprinkles jimmies
For the Streusel Topping
- 3 tablespoons unsalted butter melted
- ½ cup granulated sugar
- ½ cup all-purpose flour
- 2 tablespoons rainbow sprinkles jimmies
Instructions
- Preheat your oven to 400°F and line a 12-cup muffin pan with paper liners (or grease the cups well).
- In a large bowl, whisk together the melted butter and granulated sugar for a full 2 minutes. This step matters! It dissolves the sugar and creates that fluffy texture.
- Add the eggs, vanilla extract, and cake batter extract. Whisk until smooth and combined.
- Pour in the sour cream and whole milk and whisk until everything is silky and uniform.
- Add the flour, baking powder, and salt right into the bowl, then gently FOLD them in with a spatula until just combined. Do not overmix or your muffins will turn out tough.
- Fold in the 3/4 cup of sprinkles, just enough to distribute them evenly throughout the batter.
- Make the streusel by stirring together the melted butter, flour, sugar, and sprinkles in a separate bowl until you have big crumbly clumps.
- Scoop the batter evenly into your 12 muffin cups, filling each almost all the way to the top. Generously pile that streusel on every single muffin (yes, use ALL of it).
- Bake at 400°F for 10 minutes, then WITHOUT opening the oven, drop the temperature to 350°F and bake for another 10 minutes. This is the trick to that perfect bakery dome!
- Let the muffins cool in the pan for 5 minutes, then transfer to a wire rack. Try to wait a couple minutes before devouring (good luck).
Storage Instructions
- Counter: Store in an airtight container at room temperature for up to 3 days. They are honestly even better on day 2.
- Fridge: Store in an airtight container in the fridge for up to 5 days. Pop them in the microwave for 15 seconds to bring them right back to life.
- Freezer: Wrap individually in plastic wrap and pop in a freezer bag for up to 2 months. Thaw on the counter overnight or microwave from frozen for about 30 seconds.
Tips and Tricks
- The two-temperature bake (400 then 350) is non-negotiable for that tall bakery dome. The initial blast of high heat shocks the leavening and pushes the muffins UP fast, then the lower temp finishes them off without burning.
- Fill those muffin cups ALL the way. You want them generously full so they puff up and over the top of the liner.
- Use jimmies, never nonpareils. The little round sprinkles bleed color into the batter and turn everything weirdly gray.
- Let the melted butter cool slightly before mixing it with the eggs so you don’t accidentally cook them.
FAQ
Can I use a box of cake mix instead?
No, this recipe is built from scratch and gives you a much fluffier, more bakery-style result. Box mix muffins always come out a little flat for me!
Why did my sprinkles bleed and turn the batter gray?
You probably used nonpareils (the tiny round balls) instead of jimmies. Always grab jimmies for baked goods so the color stays bright and beautiful.
Can I make this as a loaf or sheet cake?
Yes! Pour the batter into a greased 9×5 loaf pan and bake at 350°F for 45 to 55 minutes, or use a 9×9 pan for about 30 minutes. Check with a toothpick.
My muffins came out flat. What happened?
Two likely culprits: your baking powder might be expired, or you opened the oven door too early during baking. Both will kill that beautiful lift!
Can I make the batter the night before?
I don’t recommend it. Once the baking powder hits the wet ingredients, the clock is ticking. Bake the same day for the best dome.
Where can I buy cake batter extract?
Amazon has a ton of options, and you can usually find it at Michael’s, Hobby Lobby, or specialty baking shops.
Do you LOVE Muffins?! Check Out MORE of my Favs:
Fluffy Brown Butter Chocolate Swirl Pumpkin Muffins (Bakery-Style Fall Muffins)
Easy Lemon Blueberry Muffins Recipe
Quick and Easy Cinnamon Roll Muffins: No Yeast Required!
Tag Me!
If you bake up a batch of these Birthday Cake Crumble Muffins, please please tag me @munchiesbymallory on Instagram and TikTok. I LOVE seeing your bakes pop up in my feed, and honestly there is nothing better than a kitchen full of sprinkles. Happy birthday baking, friends!
Leave a Reply Cancel reply