Blueberry Lemon Muffin Bars

Name: Blueberry Lemon Muffin Bars
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 12.0
Ingredients: 2 cups all-purpose flour; 1 cup granulated sugar; 1 tablespoon baking powder; 1/2 teaspoon salt; 1/2 cup unsalted butter, melted (I use Kerrygold); 1 cup whole milk; 2 large eggs; 1 tablespoon lemon zest (about 1 lemon); 1/4 cup lemon juice (fresh squeezed is best); 1 cup blueberries (fresh or frozen); Powdered sugar, for dusting (optional)

Highlighted under: Indulgent Baking Ideas

Needed something sweet to satisfy my afternoon cravings, so I decided to make these blueberry lemon muffin bars. They’re super easy to throw together and brightened up my kitchen with their amazing scent. Plus, they travel well, which is a bonus when you want to share treats with friends or family. Honestly, I’m always looking for ways to use up ripe blueberries, and these bars ended up being just what I needed.

Created by

The Meals By Sophia Team

Last updated on 2026-05-21T23:18:19.107Z

I’ll be honest, I had a couple of overripe lemons and a pint of blueberries that were looking for a home, so I decided to combine them into a treat. I first tried adding lemon zest into the batter, and it really made a difference in the flavor – it’s bright and refreshing. If you enjoy a little tang with your blueberries, don’t skip that step!

The texture of these bars is pretty fantastic too. They’re kind of like a cross between a muffin and a cake, which makes them perfect for breakfast or dessert. I once used a little too much lemon juice and had to adjust the flour, so be careful not to go overboard there. But the end result? Totally worth it.

Getting the Texture Right for Blueberry Lemon Muffin Bars

The key to getting the right texture with these muffin bars lies in how you mix the wet and dry ingredients. I always try to avoid overmixing, which can make them tough. A few lumps in the batter are perfectly fine; they will bake out and keep the bars light and fluffy.

Also, if you're using fresh blueberries, be sure to coat them lightly in flour before adding them to the batter. This little trick helps prevent them from sinking to the bottom during baking. Honestly, I learned this the hard way after some less-than-ideal batches.

Ingredient Notes

While the recipe calls for whole milk, you can substitute with any milk you have on hand, though the texture might vary slightly. If you're looking to cut calories, a lower-fat milk will generally work out okay, though I find that the richer the milk, the better the bars often taste.

And for the butter, I tend to use Kerrygold because I love the flavor, but regular unsalted butter is just fine too. Just be sure to melt it and let it cool slightly before adding, or you might end up scrambling your eggs when they hit the hot butter. Trust me, I’ve been there.

Ingredients

Gather these ingredients before you start!

Ingredients

2 cups all-purpose flour
1 cup granulated sugar
1 tablespoon baking powder
1/2 teaspoon salt
1/2 cup unsalted butter, melted (I use Kerrygold)
1 cup whole milk
2 large eggs
1 tablespoon lemon zest (about 1 lemon)
1/4 cup lemon juice (fresh squeezed is best)
1 cup blueberries (fresh or frozen)
Powdered sugar, for dusting (optional)

Time to mix everything together!

Instructions

Follow these steps to make your muffin bars!

Preheat your oven

Start by preheating your oven to 350°F (175°C). I usually like to grease a 9x13-inch baking pan with a little butter or line it with parchment paper for easy removal later.

Mix your dry ingredients

In a large bowl, whisk together the flour, sugar, baking powder, and salt until combined. It’s handy to sift if you're feeling fancy, but I usually just mix it really well to avoid any lumps.

Combine the wet ingredients

In another bowl, mix the melted butter, milk, eggs, lemon zest, and lemon juice together. You want everything to be blended well, so give it a good whisk. Make sure your butter isn’t too hot, or it could cook the eggs.

Mix wet and dry ingredients

Pour the wet ingredients into the dry ingredients, and stir gently until just combined. I often find it helps to use a spatula here rather than a whisk to avoid overmixing. A few lumps are totally fine!

Add the blueberries

Gently fold in the blueberries. If you’re using frozen ones, don’t worry about thawing them, just try not to squish them too much while mixing. You want those bright pops of blueberry in every bite.

Pour into the pan and bake

Pour the batter into your prepared baking pan and smooth it out evenly. Bake in the preheated oven for about 25 minutes, or until a toothpick comes out clean. Keep an eye on them, as ovens can vary!

Let cool and serve

Once they are done baking, allow the bars to cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely. Dust with powdered sugar if you want to be a little fancy, but they're lovely on their own too.

Enjoy your delicious muffin bars!

Pro Tips

Tip 1: If you want to change things up, try adding some chopped nuts or a sprinkle of cinnamon. Tip 2: Store them in an airtight container, and they should stay fresh for a few days. Tip 3: If you have any leftovers (not likely!), you can freeze them for later fun. Tip 4: Check the bars a minute or two early to avoid overbaking.

Scaling Blueberry Lemon Muffin Bars for a Crowd

If you want to make these muffin bars for a larger group, you can easily double the recipe. Just remember to use two separate 9x13-inch pans or bake in batches. If you’re using more than one pan, check for doneness a bit earlier since multiple pans can lead to uneven baking.

When I do this, I like to switch the pans halfway through baking to help them cook more evenly. Also, consider adding a bit more lemon zest to give an extra punch when making a bigger batch. It’s a tiny tweak that makes a noticeable difference!