
Coconut Rhubarb Crunch is my springtime secret for a show-stopping dessert that tastes like sunshine in a dish. The tartness of rhubarb gets cozy with brown sugar, oats, and plenty of coconut for a treat that is both comforting and fresh. Whether for a weekend family dinner or a casual gathering with friends, this easy bake never fails to impress. The smell of coconut mingling with bubbling fruit will soon have everyone peeking into the kitchen.
I remember the first time I brought this out at a potluck guests hovered around for seconds and the kids loved every sweet-tart bite. Every spring since I always look forward to the first rhubarb crop knowing this crunch will be on our table.
Ingredients
- Fresh rhubarb: Diced into bite-size pieces adds refreshing tartness and bright color. Look for firm stalks with vivid red-pink hues.
- Granulated sugar: Sweetens up the rhubarb and helps draw out its juices. Use cane sugar for a cleaner flavor.
- All-purpose flour: Just a spoonful thickens the fruit filling a bit. Choose unbleached if you have it.
- Vanilla extract: Ties the flavors together and makes the aroma warm and delicious. Use pure vanilla for more depth.
- Melted butter: Both in the filling and topping makes the dessert rich and moist. Go for high-quality unsalted or European style if possible.
- Brown sugar: In the topping lends a deep molasses note that complements rhubarb. Choose soft and moist brown sugar for easy mixing.
- Rolled oats: Make the topping hearty and give it that classic crunch. Use old-fashioned oats for the best texture.
- Shredded sweetened coconut: The star ingredient offering chewy texture and tropical flavor. Opt for fresh soft shreds not dried out bags.
Step-by-Step Instructions
- Prepare the Filling:
- In a large bowl combine the diced rhubarb with granulated sugar, a spoonful of flour, vanilla extract, and melted butter. Stir until all the fruit is coated and moist. You want to make sure the sugar and flour dissolve into the rhubarb juices so there are no lumps.
- Layer the Filling:
- Pour the rhubarb mixture into a well-greased nine by nine inch baking dish and spread it into an even layer. Make sure every corner has some fruit for balanced bites.
- Mix the Topping:
- In a new bowl mix together flour, brown sugar, rolled oats, shredded coconut, and the rest of the melted butter. Use your fingertips to break up any clumps until the mixture becomes crumbly and moist. Checking the feel of the topping here is important for a perfect golden crunch.
- Add the Topping:
- Sprinkle the topping evenly all over the rhubarb layer. Try not to press it down too hard so it stays crisp during baking. Cover all the fruit so none peeks out.
- Bake:
- Slide the dish into a preheated three hundred fifty degree oven. Bake uncovered for thirty-five to forty minutes. Watch for a bubbling edge and a golden top for the right doneness.
- Cool and Serve:
- Let the dessert cool for at least fifteen minutes before serving so it can set slightly. The juicy filling thickens up as it cools. You can serve it warm for extra comfort or at room temperature for easy slicing.

Sweet coconut is the sprinkle that keeps everyone coming back for seconds. Every time I bake with it I think of my grandmother who would sneak some into every fruit dessert because she liked how it turned chewy around the edges.
Storage Tips
After baking, let the coconut rhubarb crunch cool completely before covering the dish tightly with foil or plastic wrap. Pop the dish in the fridge and it will stay fresh for up to four days. For longer storage, you can freeze individual portions in airtight containers for several weeks. To reheat, bake uncovered at a low temperature to bring back the crisp topping rather than microwaving which can soften it.
Ingredient Substitutions
If rhubarb is not in season, you can use an equal amount of diced apples or strawberries for a new twist. For a gluten free version, use your favorite gluten free flour blend. Old-fashioned oats provide the best texture, but quick oats work in a pinch. For added flavor, a handful of chopped pecans or walnuts can be mixed into the topping. If sweetened coconut is too much, try unsweetened and add a bit more sugar to taste.
Serving Suggestions
A scoop of coconut rhubarb crunch is perfect on its own but takes on a whole new life with a generous spoonful of vanilla ice cream or a dollop of softly whipped cream. For a brunch treat, serve it warm alongside Greek yogurt with a sprinkle of cinnamon or toasted coconut. For parties, cut into bars for easy serving and pack in a picnic basket for the perfect sunny day treat.

Experiment with every batch. I sometimes swap in berries or add a pinch of cardamom for something new. There are endless ways to make this dessert your family’s signature spring treat.
Frequently Asked Questions
- → Can I use frozen rhubarb?
Yes, use frozen rhubarb without thawing. Add a little extra flour if there's excess moisture.
- → What type of coconut is best for this dessert?
Shredded sweetened coconut lends a chewy texture and adds pleasant sweetness to the topping.
- → Can this be served cold?
Absolutely. It's delicious at room temperature or chilled, though the topping is crunchiest when warm.
- → Is this suitable for making ahead?
Yes. Prepare and bake, then cool and cover. Warm briefly in the oven before serving for best texture.
- → How can I make the topping extra crisp?
Bake until deeply golden and bubbly at the edges, and let it cool slightly before serving to set the topping.