1 1/4 cups plain wholemeal flour
1 1/4 cup rolled oats
1 teaspoon baking powder
1/2 teaspoon salt
1 tablespoon butter or margarine, melted
1/4 cup milk
1 teaspoon vanilla extract
1/3 cup sugar
2 tablespoons custard powder (of course feel free to make your custard from scratch if preferred)
1 1/2 cups milk
*Optional ingredients: sultanas, pumpkin seeds, sunflower seeds, chopped nuts, cinnamon, passion fruit pulp
Preheat an oven to 180 degrees and line a slice tin with baking paper (lightly spray with oil for extra anti-stick insurance).
In a large mixing bowl combine flour, oats, baking powder, salt and sugar. In a small mixing bowl combine melted butter/marg, vanilla extract and milk (1/4 cup). Pour this milk mixture into the flour mixture and combine roughly (a little bit of dryer mixture left in the bottom is ok).
Press half of the mixture (the wetter half ideally) into the lined slice tin and place in the pre-heated oven for 15mins.
In the meantime, in a medium sized microwave bowl whisk together custard powder and milk (1 1/2 cup; or begin making your own custard). Microwave on high for 2 mins before stirring. Return to the microwave for a further 2 mins (microwave time vary, so keep an eye on it). Remove from the microwave and set aside until the crumble base is ready.
Once crumble base begins to lightly golden remove from the oven and spread the custard evenly over the top. Crumble the remaining flour mixture over the top and return to the oven for 20 - 30 mins or until the crumble is golden.
*Any of the optional ingredients can be added to the top layer of crumble before returning to the oven (and if you come up with any other ingredients to add, please share them with us!)
Once cooked, allow to thoroughly cool before removing from the tin and slicing. Store in an airtight container for several days.