Step 1

Preheat the oven to 200ºc/180ºfan and line a 9x9" square tin with parchment paper.

Step 2

In a large bowl, add the rolled oats, plain flour, light brown soft sugar, baking powder and unsalted butter.

Step 3

Rub the ingredients together with your fingers until the mixture resembles bread crumbs and there are no large lumps of butter left.

Step 4

In a new bowl, add the fresh raspberries, raspberry jam, lemon juice and cornflour.

Step 5

Mash the ingredients together until they are combined, but still leaving some texture to the raspberries.

Step 6

Pour 500g of the oaty crumble mix into the lined tin and press down firmly.

Step 7

Pour the filling onto of the oats, and spread.

Step 8

Sprinkle over the rest of the crumble mix

Step 9

Bake the raspberry crumble bars in the oven for 30+ minutes, or until golden and beautiful.

Step 10

Leave the bars to cool fully before portioning. Refrigerating them can sometimes make this easier.