
This blueberry rhubarb crisp is my favorite solution to a summer dessert craving when I want something vibrant and just the right amount of sweet. The mix of tangy rhubarb and juicy blueberries tastes even better with a golden oat pecan topping that happens to be gluten free and dairy free. I love that you can pull this together quickly with simple ingredients and let your oven do the work before sitting down to a comforting warm treat.
I was searching for an easy dessert after a day at the farmer market and this crisp was a hit that afternoon. Now I make it a few times every summer especially when rhubarb shows up in the produce aisle.
Ingredients
- Rhubarb: fresh or thawed frozen brings a tart and bright flavor. Pick stalks that are firm and crisp
- Blueberries: add a sweet juicy pop. Choose plump berries that are deep blue for the best taste
- Honey: brings a gentle floral sweetness plus it keeps things refined sugar free. I like to taste my fruit mix before baking in case I want a little more
- Ground cinnamon: adds subtle warmth and depth that flatters both fruits
- Ground cloves: a pinch if you like adds background spice and coziness
- Cornstarch: helps thicken the fruit juices so you get that perfect glossy consistency. Make sure it is lump free
- Oats: create the crispy topping. Quick oats work best for a lighter crunch but old fashioned can be used if needed
- Pecans: lend a nutty crunch and richness. Look for pecans that smell sweet and not stale
- Unsweetened cocoa powder: deepens the flavor and gives the topping a little more complexity
- Coconut oil: melted binds everything together and stays dairy free. Check that your oil is fresh for best results
Step-by-Step Instructions
- Prepare the Fruit Filling:
- Slice rhubarb into half inch pieces discarding any tough ends. In a large bowl toss with blueberries honey cinnamon cloves and cornstarch until the fruit looks evenly coated and glossy
- Fill the Baking Dish:
- Spread the fruit mixture into a 9 by 7 inch ovenproof dish. Make sure you have an even layer so it bakes uniformly
- Mix the Crisp Topping:
- In a separate bowl combine oats chopped pecans cocoa powder honey and melted coconut oil. Use a fork or your hands to thoroughly mix until the mixture resembles damp sand
- Top the Fruit:
- Sprinkle the oat pecan mixture evenly over the fruit without pressing down too hard. Aim for a crumbly texture with some clusters for crunch
- Bake to Perfection:
- Place the dish in a preheated oven at 350 degrees. Bake for about 40 minutes until the topping looks golden and the fruit is bubbling and tender. Check the rhubarb with a skewer or fork it should feel soft
- Enjoy Warm:
- Let the crisp cool for a few minutes before serving. The juices will thicken as it stands and the topping stays crunchy

I always look forward to the contrast of the tart rhubarb with luscious blueberries. My kids love to sprinkle chopped pecans right before baking and the ritual of pulling the bubbling crisp out of the oven fills the kitchen with the best aroma.
Storage Tips
Keep any leftovers in an airtight container in the refrigerator for up to three days. The topping will stay crispy if you reheat portions in a toaster oven or regular oven at low heat. If you want to freeze individual servings let them cool completely and wrap tightly before freezing.
Ingredient Substitutions
Swap pecans for walnuts or almonds if that is what you have. If you need this nut free sunflower seeds work nicely. Maple syrup can stand in for honey and coconut oil can be replaced with a mild olive oil if desired.

Serving Suggestions
This crisp is wonderful served warm as is or topped with a scoop of non dairy vanilla ice cream. Sometimes I like to pour a little coconut cream over each portion. It is just as good chilled and eaten for breakfast with plain yogurt.
Cultural Context
Fruit crisps and crumbles trace their origins to British and American home cooking traditions where seasonal produce is paired with simple pantry staples for comforting desserts. Rhubarb especially shines in cooler climates where it grows abundantly in early summer making it a classic choice for these easy baked sweets.
Frequently Asked Questions
- → Can I use frozen rhubarb or blueberries?
Yes, frozen or thawed rhubarb and blueberries both work well. Be sure to drain any excess liquid if using frozen fruit for best results.
- → How do I know when the crisp is done?
The crisp is ready when the topping is golden and the rhubarb is soft. Test by inserting a skewer into a piece of rhubarb; it should go in easily.
- → Is this dessert gluten-free?
Yes, as long as you use certified gluten-free oats, this dessert contains no flour and is suitable for gluten-free diets.
- → How can I adjust the sweetness?
The honey amount can be increased or decreased based on your preference or the tartness of the fruit. Adjust to taste after mixing.
- → Can I substitute another nut for pecans?
Chopped walnuts or almonds can be used in place of pecans for the topping if desired. Each brings their own flavor and crunch.
- → What is the best way to serve this crisp?
Serve warm, optionally with a scoop of vanilla ice cream or a dollop of yogurt for extra creaminess and contrast.