Cut the butter into the flour with two knives, then rub with your fingers until you have a crumble texture.
Stir in the sugar.
Filling:
Chop rhubarb into small pieces.
Partially cook with rhubarb with ⅔ cup of sugar.
Make the Rhubarb Crumble:
Place the filling in the bottom of a 9" pie dish or 8" x 8" in pan.
Sprinkle the topping on the rhubarb.
Bake at 400°F (205°C) for about 25 minutes or until golden brown. Spoon into dishes and serve warm, but I'd highly recommend serving it with homemade custard.
Notes
(Hint: remember the 1, 2, 3 and double to get 2, 4, 6 for the ingredient amounts!) Easy to remember!
Rhubarb crumble freezes exceptionally well.
Substitute flour with oat flour (process or blend rolled oats) for a flour/gf alternative.)
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