Slow Cooker Oatmeal Apple Crumble with Bisquick

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This slow cooker oatmeal apple crumble will put a smile on everyone’s face, especially the cook’s. Bisquick is the secret ingredient that thickens the apple crumble to perfection.

What is an apple crumble?

A crumble is baked in a pie dish, but doesn’t have a crust. Instead, a crumble has a streusel style topping. (A crisp is similar, having oats in the topping, but baked until crisp. A cobbler has a biscuit dough topping that looks like a cobblestone road.)

This crumble can be made in advance in the slow cooker.

One of the best things about slow cooker crumble is that you can put it in the slow cooker 3 hours in advance, leaving you free to focus on preparation of the rest of the meal.

Do I have to use fresh fruit in a crumble?

Fresh fruit is best in a crumble, but you can use frozen. Kitchn recommends defrosting the fruit first and then cutting it into smaller bite-sized pieces which is great advice. They also say that pie filling is just too sweet to use in a crumble and can make it gummy.

When is a crumble done cooking?

You will know a crumble is done when it is bubbling around the edges (which it needs to do to thicken), and the topping is nicely browned.

How do I serve Oatmeal Apple crumble?

Scoop the crumble while still warm into individual bowls and top with vanilla ice cream. (Make your own homemade vanilla ice cream without an ice cream maker!)

Or try McCormick’s Vanilla Bean Whipped Cream: beat 1 cup heavy cream, 1/4 cup confectioners’ sugar, and 1 teaspoon McCormick® Vanilla Bean Paste in medium bowl with electric mixer on high speed until stiff peaks form. Cover and refrigerate until ready to serve.

Can I serve Oatmeal Apple Crumble cold?

You can serve crumble cold, but it’s at it heart warming best when served hot out of the oven (or slow cooker) with a cold topping like ice cream for an amazing contrast.

Here’s the perfect beverage to serve with apple crumble.

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apple cobbler in the slow cooker

Oatmeal Apple Crumble in the Slow Cooker

  • Author: McCormick
  • Total Time: 3 hours 15 minutes
  • Yield: 10 servings 1x


Heart warming autumn recipe made in the slow cooker. The cook loves this fast & easy Oatmeal Apple Crumble more than anyone else.


Units Scale

Apple Filling:

  • 5 medium Gala apples, peeled, cored and thinly sliced
  • 1 c firmly packed brown sugar
  • 1/4 c biscuit mix, such as Bisquick
  • 1 tsp McCormick Ground Cinnamon

Oatmeal Crumble Topping:

  • 1 c biscuit mix, such as Bisquick
  • 1/2 c quick-cooking oats
  • 1/2 c firmly packed brown sugar
  • 1/3 c sugar
  • 1/4 tsp salt
  • 1/2 tsp McCormick Ground Cinnamon
  • 1/2 c cold butter, cut into pieces


  1. Spray inside of slow cooker with no stick cooking spray. For the Apple Filling, toss apple slices, brown sugar, baking mix and cinnamon in large bowl. Place in slow cooker.

  2. For the Crumble Topping, mix all ingredients, except butter, in medium bowl. Cut in butter with fork until crumbly. Sprinkle over Apple Filling. Cover.

  3. Cook 3 hours on high.


If you’d like to cook this crumble in the oven, bake at 375° for 30-40 minutes.

We provide nutritional information but these figures should be considered estimates as they are not calculated by a registered dietitian. Please consult a medical professional for any specific nutrition, diet, or allergy advice.

  • Prep Time: 15 minutes
  • Cook Time: 3 hours
  • Category: Dessert
  • Method: Slow Cooker
  • Cuisine: American


  • Calories: 366

Recipe and images courtesy of McCormick

How do I store leftover apple crumble?

To store leftover crumble, cover and refrigerate for 2-3 days. Crumble is best served warm right after cooking, because the topping will get a little soggy after sitting the fridge.

What is the best way to reheat crumble?

You can reheat crumble in the microwave, but the best way is in the oven because it stays warm longer. Let the crumble come to room temperature while the oven preheats to 350°F. Bake for 20 minutes and it will be ready to eat. Keep an eye on it – you don’t want the topping to brown too much.

Can I freeze apple crumble?

You can freeze leftover crumble for up to 1 month. After it is completely cool, cover it and freeze. (If you freeze it in an oven proof dish, it’s easier to defrost and reheat.) Let it defrost overnight in the fridge and reheat in 350°F oven for about 20 minutes. If you’re concerned that the topping might brown too much, wrap aluminum foil around the edges of the dish.

It’s Your Turn.

Do you like to use the slow cooker to make dessert?

Did you make this recipe? If yes, tell us what you think & add a photo to your comment.


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Slow Cooker Oatmeal Apple Crumble with Bisquick

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