Buttermilk blueberry breakfast cake is the kind of bake that makes a regular morning feel a little more intentional. It’s tender like a snack cake, bright from lemon zest, and packed with juicy blueberries—perfect when you want something sweet but not frosting-sweet. I like making it when blueberries are at their best, or when I’m hosting and want a “slice-and-serve” breakfast that doesn’t require flipping pancakes all morning.
Why you’ll love this dish
- Reliable, bakery-style crumb: Buttermilk plus proper creaming gives you a soft, plush texture without being heavy.
- Fast to pull together: One bowl for wet + one for dry, then fold in berries and bake.
- Great for sharing: It slices cleanly once slightly cooled, making it ideal for brunch tables and potlucks.
- Not-too-sweet: The lemon zest and tangy buttermilk keep the sweetness balanced.
- Beginner-friendly: No fancy techniques—just a few key cues (don’t overmix; test for doneness correctly).
“I made this for a weekend brunch and it disappeared before the coffee was done brewing. The lemon-blueberry combo tastes like a muffin, but the texture is even better.”
How to make Buttermilk Blueberry Breakfast Cake
Step-by-step overview (what to expect)
- Cream butter, sugar, and lemon zest until fluffy—this builds lift and a tender crumb.
- Beat in egg and vanilla for structure and flavor.
- Coat blueberries with flour so they suspend better and don’t sink as much.
- Alternate dry ingredients with buttermilk and mix gently—overmixing makes the cake tough.
- Spread in a pan, sprinkle sugar, then bake until a toothpick comes out clean.
Ingredients (what you’ll need)
- ½ cup (8 tablespoons | 4 oz | 113 g) unsalted butter, room temperature
- Zest from 1 large lemon
- 1 cup (214 g) sugar, set aside 1 tablespoon for sprinkling
- 1 egg, room temperature
- 1 tsp vanilla extract
- 2 cups (256 g) all-purpose flour, set aside ¼ cup to toss with blueberries
- 2 tsp baking powder
- 1 tsp kosher salt (I like 1¼ tsp)
- 2 cups fresh blueberries, picked over
- ½ cup buttermilk (see FAQs for substitutes)
Quick notes:
- Fresh blueberries hold their shape best here. If using frozen, don’t thaw first (details in FAQs).
- Room-temperature butter and egg help the batter emulsify smoothly, which improves texture.
Directions (step-by-step instructions)
- Preheat your oven to 350°F (175°C).
- In a stand mixer (or with a hand mixer), cream the butter, lemon zest, and 1 cup minus 1 tablespoon sugar until light and fluffy (about 2–3 minutes). Scrape down the bowl.
- Add the egg and vanilla. Beat until fully combined.
- In a small bowl, toss the blueberries with ¼ cup of the flour. Set aside.
- In another bowl, whisk the remaining flour with baking powder and salt.
- Add half of the dry mixture to the butter mixture. Stir gently with a spatula until mostly incorporated.
- Pour in all the buttermilk. Stir just until combined.
- Add the remaining dry ingredients and stir until you no longer see dry flour. Don’t overmix.
- Fold in the blueberries gently. Leave any extra flour sitting in the blueberry bowl behind.
- Grease an 8- or 9-inch square pan with butter or nonstick spray. For easiest removal, line with parchment (especially helpful with an 8-inch pan).
- Spread the batter evenly in the pan. Sprinkle the top with the reserved 1 tablespoon sugar.
- Bake 35–45 minutes:
- 9-inch pan: usually closer to 35 minutes
- 8-inch pan: often 40–45 minutes (sometimes up to 50 minutes, depending on your pan and oven)
Start checking at 35 minutes. A toothpick should come out clean or with a few moist crumbs, not wet batter.
- Cool at least 15 minutes before slicing so it sets and cuts neatly.
How to serve Buttermilk Blueberry Breakfast Cake (serving suggestions)
- Serve warm with salted butter melting over the top.
- Add a spoonful of Greek yogurt or crème fraîche on the side for tang.
- Pair with scrambled eggs or a vegetable frittata to balance sweetness.
- For a brunch board: slice into squares and serve with fresh berries, honey, and coffee or tea.
- Optional finishing touch: a light dusting of powdered sugar once cooled (skip if you love the crunchy sugar top as-is).
How to store (storage and reheating tips)
- Room temperature: Store tightly covered for up to 2 days.
- Refrigerator: For longer storage, refrigerate in an airtight container up to 5 days. (Chilling can firm the crumb; rewarm to revive softness.)
- Freeze: Wrap individual pieces in plastic wrap, then place in a freezer bag. Freeze up to 2–3 months for best quality.
- Reheat: Warm slices in the microwave for 10–20 seconds, or in a 300°F oven for about 8–10 minutes.
Food safety note: Don’t leave perishable toppings (like yogurt/cream) at room temp for extended periods—serve them separately.
Tips to make it (tricks for success)
- Cream thoroughly: “Light and fluffy” isn’t just a phrase—it creates air pockets that help the cake rise.
- Measure flour correctly: Spoon flour into the measuring cup and level it off. Too much flour = dry cake.
- Fold, don’t beat once flour is added: Overmixing develops gluten and makes the cake chewy.
- Use parchment if you want clean edges and easy lifting.
- Check doneness in the center: Edges can look done while the middle needs more time, especially in an 8-inch pan.
Variations (different ways to try it)
- Orange-blueberry: Swap lemon zest for orange zest.
- Almond twist: Replace vanilla with ½ tsp almond extract (almond can be strong—go light).
- Streusel topping: Add a quick crumble of butter, brown sugar, and flour for extra crunch.
- Mixed berries: Use half blueberries, half raspberries (fold gently—raspberries break easily).
- Dairy-free option: Use plant-based butter and “buttermilk” made from non-dairy milk + acid (see FAQs). Texture will be slightly different but still good.
FAQs (your questions answered)
Can I use frozen blueberries?
Yes. Use them straight from frozen and toss with the flour as written. Expect a little more purple streaking in the batter, and you may need a few extra minutes of bake time.
What can I substitute for buttermilk?
If you don’t have buttermilk, mix ½ cup milk (dairy or unsweetened non-dairy) with 1½ tsp lemon juice or white vinegar. Let it sit 5 minutes, then use. It won’t be identical to real buttermilk, but it provides acidity and tenderness.
Why did my blueberries sink?
Common causes: batter was overmixed (thinner structure), berries were very large/juicy, or you skipped the flour toss. The flour coating helps, but some sinking can still happen—especially with very ripe berries.
Can I make this ahead for brunch?
Yes. Bake it the day before, cool completely, cover tightly, and keep at room temperature overnight (or refrigerate if your kitchen runs warm). Rewarm slices briefly before serving for the best texture.
How do I know it’s fully baked without drying it out?
Start checking early, but rely on the center: a toothpick should come out clean or with a few moist crumbs. If you see wet batter, keep baking in 2–5 minute increments. Overbaking is what dries it out, so short check intervals help.
Buttermilk Blueberry Breakfast Cake
A tender and tangy breakfast cake that combines juicy blueberries with lemon zest, perfect for brunch or a special breakfast.
Ingredients
For the Cake
- ½ cup ½ cup (8 tablespoons | 4 oz | 113 g) unsalted butter, room temperature Ensure butter is at room temperature for best mixing
- 1 large Zest from 1 large lemon Adds brightness to the flavor
- 1 cup 1 cup (214 g) sugar, set aside 1 tablespoon for sprinkling Adjust for sweetness if desired
- 1 1 egg, room temperature Room temperature helps emulsification
- 1 tsp 1 tsp vanilla extract For additional flavor
- 2 cups 2 cups (256 g) all-purpose flour, set aside ¼ cup to toss with blueberries Measuring accurately is crucial
- 2 tsp 2 tsp baking powder Leavening agent for the cake
- 1 tsp 1 tsp kosher salt Adjustable based on personal taste; I like 1¼ tsp
- 2 cups 2 cups fresh blueberries, picked over Fresh blueberries work best
- ½ cup ½ cup buttermilk See FAQs for substitutes
Instructions
Preparation
- Preheat your oven to 350°F (175°C).
- In a stand mixer (or with a hand mixer), cream the butter, lemon zest, and 1 cup minus 1 tablespoon sugar until light and fluffy (about 2–3 minutes). Scrape down the bowl.
- Add the egg and vanilla. Beat until fully combined.
- In a small bowl, toss the blueberries with ¼ cup of the flour. Set aside.
- In another bowl, whisk the remaining flour with baking powder and salt.
Mixing and Baking
- Add half of the dry mixture to the butter mixture. Stir gently with a spatula until mostly incorporated.
- Pour in all the buttermilk. Stir just until combined.
- Add the remaining dry ingredients and stir until you no longer see dry flour. Don’t overmix.
- Fold in the blueberries gently. Leave any extra flour sitting in the blueberry bowl behind.
- Grease an 8- or 9-inch square pan with butter or nonstick spray. For easiest removal, line with parchment (especially helpful with an 8-inch pan).
- Spread the batter evenly in the pan. Sprinkle the top with the reserved 1 tablespoon sugar.
- Bake for 35–45 minutes, checking at 35 minutes. A toothpick should come out clean or with a few moist crumbs.
Cooling and Serving
- Cool at least 15 minutes before slicing so it sets and cuts neatly.
- Serve warm with salted butter melting over the top or add a spoonful of Greek yogurt or crème fraîche on the side.
Notes
Store tightly covered for up to 2 days at room temperature or refrigerate in an airtight container for up to 5 days. Freeze individual pieces for 2–3 months.