There are some recipes that become tied to a season so deeply, you can almost smell them before you make them.

A Simple Summer Dessert

My grandma always seemed to have a pan of rhubarb crisp cooling on the table this time of year. The kitchen windows would be open, the garden beginning to fully wake up, and somewhere between lunch and evening chores she’d quietly pull together dessert from whatever was abundant.

Rhubarb. Apples. Strawberries.

Whatever needed using.

And when we came over, she’d always say:

“I’ll go down to the cellar and get some iced cream.”

That was the signal that the crisp was ready

It was the bubbling fruit under a buttery oat topping, scooped warm into bowls while cold ice cream melted into the corners and she always served it in bowls so nothing could be left behind.

This is her recipe exactly as I remember it.

• Why this crisp is unique
• Baking with rhubarb
• Grandma’s rhubarb crisp recipe
• Printable recipe card
• Other crisp combinations
• FAQ’s
• Pin for Later

Try my fresh rhubarb cooler – equally nostalgic, and equally delicious!

What makes this Classic Rhubarb Crisp different

This isn’t the tall, heavily topped kind of crisp you get at a bakery.

This golden brown rhubarb crisp made with cornstarch and four cups of rhubarb is thinner, gooier, softer in the center, with a bottom layer that almost turns into a shortbread crust underneath the fruit.

The filling settles somewhere between pie and pudding once it bakes.

And the top never stays crisp for long once the ice cream hits it—which honestly feels like the whole point.

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Baking with Rhubarb

Rhubarb bakes up tender and soft – this dessert is melt-in-your-mouth and provides a tasty way to use up this hearty crop.

Rhubarb maintains its nutrients when baked, so you can enjoy the taste while knowing you are getting the benefits of Vitamin K, Calcium, and Potassium.

Grandma’s Rhubarb Crisp Recipe

A simple summer dessert meant to be served warm with a melting scoop of vanilla ice cream

Ingredients

Crumb Mixture

• 1/2 cup butter, melted
• 1 cup brown sugar
• 1 cup flour
• 3/4 cup oatmeal

Filling

• 1 cup sugar
• 1 teaspoon cornstarch
• 1 cup water
• 4 cups rhubarb, strawberries, or apples, cut up

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Instructions

1. Preheat oven to 350°F
2. Prepare the rhubarb by washing and cutting into bite-sized pieces
3. In a bowl, combine melted butter, brown sugar, flour, and oatmeal. Mix until crumbly.
4. Pat half of the crumb mixture into the bottom of an 8 or 9-inch square pan
5. Reserve the remaining crumbs for the topping
6. In a saucepan, combine sugar, cornstarch, and water. Cook over medium heat until thickened.
7. Stir the thickened mixture together with the chopped rhubarb, apples, or strawberries
8. Pour fruit mixture over the bottom crust
9. Sprinkle reserved crumb mixture evenly over the top
10. Bake for about 45 minutes, until bubbling and golden

For the best rhubarb crisp, serve warm with iced cream, whipped cream, or Cool Whip.

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A few small notes from my kitchen

• Older rhubarb tends to be more tart and may need a little extra sugar.
• Use parchment paper when patting down the crumb mixture.
• Letting the crisp sit for 10–15 minutes helps the filling settle slightly before serving.
• Leftovers are especially good cold the next morning.

Printable Recipe Card

Fruit Crisp Flavor Combinations

This recipe works beautifully with:

• All variations of rhubarb for a more tart version
• Rhubarb + strawberries for classic summer flavor
• Peach in late summer
• Apples in the fall
• Or whatever combination needs using up

That was always part of my grandma’s cooking philosophy: use what’s ready.

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Questions about Baking Rhubarb Crisp

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A final thought

I think recipes like this survive because they were never trying to impress anyone.

They were simply good.

Good enough to make every summer.

Good enough to remember decades later.

Good enough that even now, whenever rhubarb season arrives, I still expect to see a warm pan cooling somewhere nearby and hear someone asking if there’s iced cream in the cellar.

Pin for Later

Flavorful desserts to make this summer

• Strawberry Ice Cream Topping
• Cottage Cheese Brulee
• Matcha White Chocolate Chip Cookies
• Oatmeal Cream Pie