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Rhubarb Crisp in the Slow Cooker

This slow cooker rhubarb crisp is easy to make, and delicious. So good. It is on the sweet side, like any great dessert. I love this recipe for the crockpot because rhubarb, for us, was being harvested early to mid-summer and it is too hot to run the oven. But a dessert in your slow cooker is perfect for hot days.

Rhubarb Crisp in the Slow Cooker

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Rhubarb Crisp in the Slow Cooker

When it came time for us to harvest our rhubarb for the first time, I turned to you all on Facebook for ideas. The response was amazing, a lot of great ideas came through. We’ve been busy with them too. Our first recipe was this slow cooker rhubarb crisp.

So far we have used our rhubarb to make a pie, which was quite great. And when I say we I made Blake and me. He made the pie, and he has made jelly as well, this rhubarb crisp and rhubarb dream bars.

This slow cooker rhubarb crisp has become a favorite to make considering how easy it is to make similar to have how easy it is to make our simple mini donuts.

Dessert doesn’t happen here all the time, which makes it that special when it does. Seasonal desserts like rhubarb crisp or rhubarb crumble are extra special.

Yes, you can freeze some from your garden, which we have done, but fresh from the garden is the best!

rhubarb plant

What You Need:

Rhubarb Mixture

  • 4 cups rhubarb cut into 3/4 ” pieces
  • 1 cup sugar
  • 1 ⁄4 cup flour
  • 1 ⁄2 teaspoon cinnamon


  • 1 cup flour
  • 1 cup brown sugar
  • 1 ⁄2 cup rolled oats
  • 1 ⁄2 cup melted butter

How to make Rhubarb Crisp in the Slow Cooker:

Now, before we get started, I had to use my small slow cooker, as I was already using my large one for supper. Summer is the season of slow cookers here. Even the slow cooker is too hot sometimes.

Mix together the cut rhubarb, fresh or frozen, we used frozen, with the white sugar, a little bit of flour, and cinnamon. Dump it in your slow cooker. Really easy to do and may be great for your kids to help out with.

Rhubarb Crisp in the Slow Cooker recipe - crock pot rhubarb crisp

Mix together the remaining, creating the crumble. Spread the crumble over the top, place lid, and cook on low for 3 hours.

Rhubarb Crisp in the Slow Cooker recipe - slow cooker rhubarb crisp

It was so full I questioned if I was going to be able to fit the lid on top correctly or if it was just going to sit on the topping. It did fit!

Now you can see just how full my crockpot is here. If you are using a small (2.5 qt) you’ll need to cook it an hour longer. If you are using a larger, casserole-sized one then the 3 hours on low will do the job.

Rhubarb Crisp in the Slow Cooker - easy slow cooker rhubarb recipes

Once it cooked, and let it cool enough to enjoy it, it was amazing! I may or may not have eaten most of both crisps that I have made.

Rhubarb Crisp in the Slow Cooker on a plate - rhubarb crumble in slow cooker

I have a really bad sweet tooth so this does not last long here.

frozen rhubarb

How to Freeze Rhubarb:

Cut stalks into one-inch pieces and them in a single layer on a parchment paper-covered cookie sheet. Freeze them until they are firm, a few hours. Then you can store them in a freezer bag for up to a year.

Read recipes to see if you can use the rhubarb frozen or if you need to thaw it first. For this recipe, I use it frozen.

More Rhubarb

Looking for a lighter rhubarb dessert? Check out this Rhubarb Dream Bar recipe.

Rhubarb Crisp in the Slow Cooker

Rhubarb Crisp in the Slow Cooker

Yield: 5
Prep Time: 5 minutes
Cook Time: 3 hours
Total Time: 3 hours 5 minutes

This slow cooker rhubarb crisp has become a favorite to make considering how easy it is to make and we have rhubarb growing in our yard.


Rhubarb Mixture

  • 4 cups rhubarb, cut into 3/4 " pieces
  • 1 cup sugar
  • 1 ⁄4 cup flour
  • 1 ⁄2 teaspoon cinnamon


  • 1 cup flour
  • 1 cup brown sugar
  • 1 ⁄2 cup rolled oats
  • 1 ⁄2 cup melted butter


  1. Combine rhubarb, sugar, flour and cinnamon and put into your slow cooker.
  2. Combine flour, brown sugar, rolled oats and melted butter and sprinkle topping over rhubarb mixture.
Nutrition Information:
Serving Size: 1 grams
Amount Per Serving: Unsaturated Fat: 0g

Resources for Baking

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