Easy Rhubarb Breakfast Cake (The Best Rhubarb Brunch Bake)

The Rhubarb Breakfast Cake You Will Want to Make Every Spring

If you have ever stared at a bundle of rhubarb and wondered what to do with rhubarb for breakfast besides the usual pie, this is the recipe you have been waiting for. This easy rhubarb cake is tender and buttery with a gorgeous crumb, a sweet brown sugar crust on top, and pockets of tart, jammy rhubarb running through every single slice. It is everything a rhubarb breakfast bake should be.

Whether you are planning a lazy weekend brunch or looking for easy rhubarb recipes for breakfast that come together without any fuss, this cake delivers. It mixes up in under 15 minutes with ingredients you almost certainly already have, and your kitchen will smell absolutely incredible while it bakes.

Why This Rhubarb Brunch Cake Works So Well

The secret is in a few thoughtful choices that make a big difference in the final result.

• Sour cream keeps the crumb incredibly moist and adds a very subtle tang that plays beautifully against the rhubarb.
• A double sugar topping of brown sugar and cold butter creates a slightly crunchy, caramelized crust on top that makes this feel like a proper coffee cake.
• Fresh rhubarb in two layers means you get tart fruit distributed through the batter and visually gorgeous pieces baked right into the top.

This is not a fussy recipe. It is the kind of rhubarb breakfast recipe that feels homey and special at the same time, which is exactly the energy you want for brunch.

Chef's Tip: Do not skip letting your butter and eggs come to room temperature before you begin. Cold butter will not cream properly, and cold eggs can cause the batter to curdle slightly. Thirty minutes on the counter makes all the difference.

Having the right tools on hand makes baking this easy rhubarb coffee cake a genuinely pleasant experience, and a good quality square baking pan with straight sides ensures even baking and clean slices every time.

How To Make Rhubarb Coffee Cake at Home

This rhubarb breakfast bake follows a classic creaming method, which sounds fancy but simply means you beat the butter and sugar together first to build a light, airy base. From there it comes together fast.

A Few Key Tips Before You Start

• Measure your flour correctly. Spoon it into the measuring cup and level it off. Scooping directly from the bag packs in too much flour and leads to a dry cake.
• Dice your rhubarb small, about half an inch. Larger pieces hold too much water and can create soggy pockets.
• Do not overmix once the flour goes in. Overmixing develops gluten and turns your tender breakfast cake tough. Mix just until the streaks of flour disappear.

Fresh rhubarb is ideal here, but if you are working with frozen, thaw it completely and pat it very dry before using it.

Ready to bake? Here is the full recipe with all the details:

Easy Rhubarb Breakfast Cake (The Best Rhubarb Brunch Bake)

This easy rhubarb breakfast cake is tender, buttery, and bursting with tart rhubarb in every bite. Perfect for brunch, weekend mornings, or anytime you want a simple rhubarb coffee cake the whole family will love.

Prep:15 mins

Cook:45 mins

Total:60 mins

Yield:9 servings

Cuisine:American

Yield: 9 servingsCalories: 312Protein: 5g

Carbs: 46gFat: 12gSat. Fat: 7gFiber: 1gSugar: 26gSodium: 210mg

Ingredients

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• 2 cups all-purpose flour, spooned and leveled
• 1 1/2 tsp baking powder
• 1/2 tsp baking soda
• 1/4 tsp salt
• 1 tsp ground cinnamon
• 1/2 cup unsalted butter, softened to room temperature
• 3/4 cup granulated sugar
• 1/4 cup brown sugar, packed, for topping
• 2 large eggs, room temperature
• 1 tsp vanilla extract, pure
• 3/4 cup sour cream, full-fat, room temperature
• 2 cups fresh rhubarb, trimmed and diced into 0.5-inch pieces
• 1 tbsp unsalted butter, cold, cut into small pieces, for topping

Instruction

1

Preheat your oven to 350 degrees F (175 degrees C). Grease a 9x9-inch square baking pan with butter or nonstick spray and line it with parchment paper for easy removal.

2

In a medium bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon. Set aside.

3

In a large bowl, beat the softened butter and granulated sugar together with a hand mixer or stand mixer on medium speed for 2 to 3 minutes, until light and fluffy.

4

Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract.

5

Reduce mixer speed to low. Add the flour mixture in three additions, alternating with the sour cream in two additions (flour, sour cream, flour, sour cream, flour). Mix just until combined after each addition. Do not overmix.

6

Fold in 1.5 cups of the diced rhubarb gently with a rubber spatula, leaving the remaining 0.5 cup for the top.

7

Spread the batter evenly into the prepared pan. Scatter the remaining rhubarb pieces over the top.

8

In a small bowl, mix together the brown sugar and cold butter pieces with your fingertips until crumbly. Sprinkle evenly over the top of the batter.

9

Bake for 40 to 45 minutes, or until a toothpick inserted in the center comes out clean and the top is golden brown.

10

Allow the cake to cool in the pan for at least 15 minutes before slicing and serving. Enjoy warm or at room temperature.

Equipment

• 9x9-inch square baking pan
• Parchment paper
• Large mixing bowl
• Medium mixing bowl
• Hand mixer or stand mixer
• Rubber spatula
• Whisk
• Measuring cups and spoons

Notes

Store leftover cake covered at room temperature for up to 2 days, or in the refrigerator for up to 5 days. To freeze, wrap individual slices tightly in plastic wrap and store in a freezer bag for up to 2 months. Reheat slices in the microwave for 20 to 30 seconds. If using frozen rhubarb, thaw and pat it dry thoroughly before folding it into the batter to avoid excess moisture.

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Serving, Storing, and Brunch Ideas With Rhubarb Cake

This cake is wonderful served slightly warm with a dusting of powdered sugar and a big mug of coffee or tea. For a proper brunch spread, pair it alongside scrambled eggs and fresh fruit for a table that feels both effortless and impressive.

Serving ideas:

• A dollop of lightly sweetened whipped cream on top
• A drizzle of vanilla glaze made from powdered sugar and milk
• Fresh strawberries on the side, since rhubarb and strawberry are a classic pairing

Storage is simple. Cover the pan and leave it at room temperature for up to two days, or refrigerate for up to five days. Individual slices freeze beautifully, making this an ideal make-ahead rhubarb breakfast option for busy mornings.

If you have rhubarb in your garden or spotted a beautiful bunch at the farmers market, this easy rhubarb breakfast cake is truly one of the best things you can do with it. Tart, sweet, buttery, and completely irresistible from the very first bite.