Rhubarb Cookies with Brown Butter Glaze
These soft and chewy Rhubarb Cookies are loaded with tender rhubarb pieces and finished with a dreamy brown butter glaze that makes them completely irresistible.
The Cookie That Makes Rhubarb the Star It Deserves to Be
Rhubarb has a bit of an identity crisis in the baking world. It spends most of its time playing second fiddle to strawberries, hiding inside pies, and generally being underestimated. These Rhubarb Cookies with Brown Butter Glaze are here to change all of that.
They are soft, chewy, and warmly spiced with cinnamon. Pockets of tender rhubarb bring a gentle tartness that balances beautifully against the sweet, nutty brown butter glaze. Once you try this combination, you will wonder why rhubarb cookies are not already everywhere.
This recipe is perfect for spring baking when rhubarb is at its peak, but honestly? Frozen rhubarb works beautifully too, which means you can bake these any time the craving hits.
Why You Will Love This Recipe
- Unexpectedly approachable. If you can make a chocolate chip cookie, you can make these.
- Perfectly balanced flavor. The tartness of rhubarb plays off the caramel depth of brown butter in the most satisfying way.
- Make-ahead friendly. The dough refrigerates beautifully, so you can prep it a day in advance.
- Crowd surprising. People always ask what is in these. Rhubarb is never the first guess.
The right tools genuinely make a difference when it comes to getting that perfect chewy texture and an evenly drizzled glaze. A good cookie scoop ensures uniform sizing, and a light-colored saucepan is essential for watching your butter brown without burning.
Tools & Ingredients We Recommend
A Note on Rhubarb: Fresh vs. Frozen
Fresh rhubarb, in season from April through June, will give you the brightest flavor and the best texture in these cookies. Look for firm, deeply colored stalks and trim off any leaves before using, as they are not edible.
Frozen rhubarb is a perfectly valid option the rest of the year. The key is to thaw it completely and pat it very dry before folding it into the dough. Excess moisture is the enemy of a chewy cookie.
Chef's Tip: Dice your rhubarb small, about a quarter-inch pieces. Larger chunks release too much liquid during baking and can make the centers of your cookies collapse or turn soggy.
The Magic of Brown Butter Glaze
If you have never browned butter before, this recipe is a wonderful excuse to start. It takes about five minutes and transforms ordinary melted butter into something that smells like toffee and hazelnuts.
The process is simple: melt butter in a light-colored saucepan over medium heat and swirl it frequently. You will see it foam, then the foam will settle, and little golden-brown specks will appear at the bottom. That is the moment. Pull it off the heat immediately and whisk in your powdered sugar and milk while it is still warm.
The result is a glaze with a depth of flavor that a plain sugar drizzle simply cannot match.
Tips for the Best Rhubarb Cookies
- Do not overmix the dough once you add the flour. A few folds with a rubber spatula is all you need.
- Chill the dough if it feels sticky or soft. Even 30 minutes in the fridge will help the cookies hold their shape.
- Pull them early. The cookies should look just barely set in the center when you take them out. They will continue to firm up on the hot pan.
- Let them cool completely before glazing, or the glaze will melt right off.
Ready to bake? Here is everything you need:
Rhubarb Cookies with Brown Butter Glaze
These soft and chewy Rhubarb Cookies are loaded with tender rhubarb pieces and finished with a dreamy brown butter glaze that makes them completely irresistible.
Ingredients
- 2 1/4 cups all-purpose flour, spooned and leveled
- 1/2 tsp baking soda
- 1/2 tsp baking powder
- 1/2 tsp salt
- 1/2 tsp ground cinnamon
- 3/4 cups unsalted butter, softened to room temperature
- 3/4 cups granulated sugar
- 1/2 cups packed light brown sugar
- 2 large eggs, room temperature
- 1 1/2 tsp pure vanilla extract
- 1 1/2 cups fresh rhubarb, trimmed and finely diced, about 0.25 inch pieces
- 4 tbsp unsalted butter, for the brown butter glaze
- 1 1/2 cups powdered sugar, sifted, for the glaze
- 2 tbsp whole milk, for the glaze, plus more as needed
- 1/4 tsp pure vanilla extract, for the glaze
Instruction
Preheat your oven to 375 degrees F (190 degrees C). Line two baking sheets with parchment paper and set aside.
In a medium bowl, whisk together the flour, baking soda, baking powder, salt, and cinnamon. Set aside.
In a large bowl, beat the softened butter, granulated sugar, and brown sugar together with an electric hand mixer on medium-high speed for 2 to 3 minutes until light and fluffy.
Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract.
Reduce the mixer to low and gradually add the flour mixture, stirring just until combined and no dry streaks remain. Do not overmix.
Fold in the diced rhubarb gently using a rubber spatula until evenly distributed throughout the dough.
Drop rounded tablespoons of dough onto the prepared baking sheets, spacing them about 2 inches apart.
Bake for 12 to 14 minutes, until the edges are lightly golden and the centers look just set. They will firm up as they cool.
Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
While the cookies cool, make the brown butter glaze. Melt the 4 tablespoons of butter in a small light-colored saucepan over medium heat, swirling frequently. Cook for 3 to 5 minutes until the butter turns a deep golden color and smells nutty. Remove from heat immediately.
Whisk the sifted powdered sugar, milk, and vanilla into the browned butter until smooth. If the glaze is too thick, add milk one teaspoon at a time until it reaches a drizzleable consistency.
Drizzle the warm brown butter glaze generously over the fully cooled cookies. Allow the glaze to set for about 15 minutes before serving.
Equipment
- 2 large baking sheets
- Parchment paper
- Electric hand mixer or stand mixer
- Large mixing bowl
- Medium mixing bowl
- Rubber spatula
- Small light-colored saucepan
- Wire cooling rack
- Whisk
- Cookie scoop or tablespoon
Notes
Serving and Storing
These cookies are lovely slightly warm, right after the glaze sets, with a cup of tea or strong coffee. They also travel well, making them a great option for potlucks, bake sales, or gifting.
Store them at room temperature in an airtight container for up to three days. Layer them between sheets of parchment paper to protect the glaze. For longer storage, freeze the unglazed baked cookies for up to two months and add a fresh drizzle after thawing.
