This apple plum crumble recipe features mixed fresh apples and plums topped with a crunchy oat crumble topping and baked in the oven to a golden brown perfection. It's a perfect fruit dessert for a crowd!
Before you start, place your butter in the freezer for at least 1 hour.
If you have a food processor: add the cold (frozen) butter and the flour to the bowl of a food processor and pulse the mixture until you have a chunky / crumb like mixture.
To the butter and flour mixture, add the spices, sugar, crushed walnuts and rolled oats, mix by hand or with a spatula until combined. For step-by-step instructions and extra tips see my crumble topping recipe.
If you prefer a clumpy topping (instead of a sandy texture) then after mixing everything let it sit at room temperature for 5-8 minutes ant then use your hand to clutch and squash the mixture. The heat from your hand will help create lumps.
Step 2. Prepare the filling
Chop the apples and the plums into thin wedges. In the backing pan (9-inch square pan) add the sliced apples and the plums, maple sugar, cinnamon and flour and and toss to coat. I used the same pan for mixing that I’m using for baking (to reduce the dirty dishes).
Spread the apple and plum filling in an even layer.
Step 3. Assemble the plum and apple crumble and bake
Preheat the oven to 360°F.
Scatter the crumb evenly over the surface of the apple and plum layer.
Bake in the oven for about 35-38 minutes, or until the topping is golden brown.
Once it’s crisp and golden remove from oven and let it cool.Serve the apple and plum crumble warm, cold or room temperature.
Make It Without Oats: just remove the oats from the recipe and add more flour and nuts to replace the oatmeal. Alternatively you can use whole grain flours like sorghum flour and brown rice or almond flour for a grain free version.