Method

1. Grease a 15cm/6in round microwaveable dish.

2. Add the butter and peanut butter to another microwaveable bowl and cook, covered, on High for 30 seconds until melted. Remove from the microwave and stir thoroughly. Leave to cool slightly then add the egg and stir to combine. Tip the peanut butter mixture into the greased dish then sieve in the cocoa powder and flour and tip in the sugar. Mix gently to form a thick, sticky paste. Smooth the top of the mixture with a spoon.

3. Make holes in the top of the brownie mixture using a teaspoon and fill each generously with the jam. Place into the microwave and cook for 3–4 minutes on high. Remove and leave to cool for 15 minutes (it needs to rest to continue cooking). Serve on its own or with ice cream, cream or custard if desired.