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DESSERTS / Low-Carb Rhubarb Crisp

Low-Carb Rhubarb Crisp

April 30, 2026 by Kahala

Juicy, tangy rhubarb bakes to perfection under a golden, crunchy topping, filling your kitchen with an inviting aroma. This Low-Carb Rhubarb Crisp is not only delicious but easy to prepare, taking about 40 minutes from start to finish. The combination of tart rhubarb and a sweet, crumbly topping creates a delightful balance that’s hard to resist.

This recipe is perfect for low-carb enthusiasts and anyone looking for a flavorful dessert. Make it during rhubarb season, or whip it up any time you need a sweet treat. You can prepare it ahead of time, and it stores well for a few days, making it a convenient option for busy weeknights.

Why You’ll Love This Recipe

  • The crust is buttery and crumbly, perfectly complementing the tender rhubarb.
  • It’s a healthier alternative to traditional crisps, low in carbs yet high in flavor.
  • The baking time is quick, allowing you to enjoy dessert in under an hour.
  • You can easily customize it by adding nuts or coconut for extra texture.

What You’ll Need

Gather your ingredients for this delightful dessert.

For the Filling

  • 2 cups rhubarb, chopped
  • 1/4 cup sweetener, like erythritol or stevia

For the Crisp Topping

  • 1/2 cup almond flour
  • 1/2 cup oats (or a low-carb substitute)
  • 1/2 teaspoon cinnamon
  • 1/4 teaspoon salt
  • 3 tablespoons butter, melted

Note: Oats can be substituted with ground flaxseed for a lower-carb option.

Substitutions & Swaps

  • Erythritol for any sweetener of choice
  • Almond flour for coconut flour (adjust measurement)
  • Oats for crushed nuts or seeds
  • Butter for coconut oil or vegan butter

How to Make It

Follow these simple steps for a delicious dessert.

1. Preheat

Preheat your oven to 350°F (175°C).

2. Mix Filling

In a mixing bowl, combine chopped rhubarb and sweetener. Spread the mixture in the bottom of a baking dish.

Low-Carb Rhubarb Crisp

3. Make Topping

In another bowl, mix almond flour, oats, cinnamon, and salt. Add melted butter and stir until crumbly.

4. Assemble

Sprinkle the oat mixture over the rhubarb evenly.

5. Bake

Bake for 25-30 minutes or until the top is golden and the rhubarb is bubbly.

6. Cool

Let it cool slightly before serving.

How to Store It

Fridge: store for up to 4 days in an airtight container.
Freezer: yes, for up to 3 months if well-wrapped.
Reheat: microwave for 30-60 seconds or until warm.

Tips for Best Results

  • Ensure the rhubarb is well-drained to prevent a soggy bottom.
  • If using frozen rhubarb, thaw and drain it before mixing with sweetener.
  • Allow it to cool before serving to help the topping firm up.
  • For added flavor, consider mixing in some vanilla extract with the filling.

Serving Suggestions

  • Serve warm with a scoop of vanilla ice cream.
  • Pair it with whipped cream for an indulgent treat.
  • Enjoy it as a sweet breakfast or brunch dish alongside coffee.

Low-Carb Rhubarb Crisp

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Easy Classic Rhubarb Crisp with Oat Topping

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