I've picked the last of the rhubarb today. The remaining stalks are starting to die off. Looks like the end of the crumbles. I've made this one with the addition of brown sugar.
It makes the crumble very tasty. I also use brown sugar in the crumble topping.
The crumble is made in the ratio of 4:2:2, 4 being the flour or a mix of flour and oats, 2 being the sugar (brown in this case) and 2 being butter which was rubbed into the flour.
Forgot to take a pic of the finished crumble because we ate most of it.
PS Good job I've frozen a pile of crumbles already.