Delicious & Moist Brown Butter Rhubarb Muffins

Let’s continue to use up that rhubarb harvest with these brown butter rhubarb muffins! If you’re already a fan of either brown butter or rhubarb, I probably don’t need to do a hard sell on these, but just in case: These are super easy to make. They’re perfectly soft and moist (ew, moist! but no other word is sufficient). They’re a little tart from the rhubarb, but the warmth of the brown butter and cinnamon, plus sweet streusel topping, balances it out perfectly. These make the IDEAL addition to a weekend brunch. They remain an absolute top favorite in my home after well over a year!

Tools & equipment for Brown Butter Rhubarb Muffins

• measuring cups and spoons
• Small skillet
• Cutting board & knife
• Liquid measuring cups
• Large & medium mixing bowls
• Muffin tin
• Muffin liners (I love these)
• Ice cream scoop or large cookie scoop
• Whisk or forks
• Spatula
• Pastry cutter

Ingredients for Brown Butter Rhubarb Muffins

For the muffin batter:

• All-purpose flour
• Granulated sugar
• Brown sugar
• Fine sea salt
• Baking powder
• Ground cinnamon
• Buttermilk: substitutions are possible but not recommended
• Unsalted butter: always my preference for baking. If you only have salted, half the added salt.
• Large eggs
• Vanilla extract or paste (if desired)
• Fresh rhubarb: I recommend dicing very finely

For the streusel topping:

• All-purpose flour
• Brown sugar
• Ground cinnamon
• Unsalted butter (cold!)

The Process

Preheat oven to 400 degrees Farenheit. Line a muffin tin with twelve paper liners or silicone muffin cups and set aside. Let your eggs and buttermilk come to room temperature, or at least close.

If not already done, finely dice your rhubarb: I like the pieces quite small, it keeps the muffins from sogging and the fruit from sinking, as well as dispersing the tartness.

Brown your butter: place the butter in a skillet or small saucepan over medium-low heat. Let it melt and continue to cook. It will begin popping and bubbling; stir gently with a spatula and keeping cooking. When the popping stops, it will start to brown. Continue to occasionally stir gently, scraping the bottom of the pan, as brown bits begin to appear on the bottom. When a lot of brown bits have formed and butter is very aromatic, remove from the heat. If you turn your back on the butter after the browning has started, it could burn, and you will know from the smell!

Set butter aside to cool.

In a large bowl, whisk together flour, sugars, salt, baking powder and cinnamon until combined.

In a large liquid measuring cup, beat together buttermilk, butter, eggs and vanilla.

Pour wet ingredients mixture into dry ingredients mixture and use a spatula to mix well, but for best results, don’t overmix- stop combining when a few little flour streaks remain. Similar to pancake batter, the muffins will toughen if they are overmixed.

Add rhubarb and mix well.

Use an ice cream scoop or a large spring-loaded cookie scoop to scoop batter into the prepared muffin pan.

Make the streusel topping:

In a medium bowl, whisk together flour, sugar, and cinnamon until well combined. I recommend a bigger bowl than you think you need: more space makes it easier to cut the butter in.

Cut the cold butter into small cubes and add to the dry mixture. Use a pastry cutter or two forks to cut the butter into the flour mixture until it forms coarse crumbs.

Sprinkle the streusel mixture on top of each muffin.

Place in oven and bake 16-19 minutes, until golden brown. Remove to a wire rack to cool. Enjoy warm or room temperature.

These are definitely best the day they’re baked, but they freeze well too if you can’t finish them-place them in the freezer in an airtight container!

FAQ’s

Can I substitute buttermilk?

Buttermilk gives baked goods a tender texture and delicious flavor. I don’t recommend substituting it if you don’t have to, but if you do, you can try this: Place a tablespoon of lemon juice or white vinegar in a liquid measuring cup, then add milk (whole or 2%) to equal one cup. Allow to sit at least 5 minutes, or for this recipe, until it comes to room temp.

You can also try just substituting it with plain whole milk: again, the flavor and texture may change somewhat, but they will probably still be pretty tasty!

The rhubarb is sinking to the bottom!

I haven’t had this problem with the rhubarb diced finely, but it can definitely be an issue in muffins if you’re using bigger or heavier fruit. If you encounter this, you can scoop a small amount of plain batter (prior to adding rhubarb) into each muffin liner, then stir rhubarb into the remaining batter and continue to fill the muffin tins.

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What Should I Make Next?

• Rhubarb Sima
• Rye Scones
• Brown Butter Pecan Scones
• Brown Butter Chocolate Chip Scones
• Giant Cinnamon Cardamom Bun

Did you make this recipe? Let me know how it went in the comments! If you share on Instagram, please tag me at @sisuhomemaker. And I always love to hear from you- send questions, comments, concerns, etc to carol@sisuhomemaker.com!