RECIPE:

• 100g butter
• 1 cup sugar
• 2 eggs
• ¾ cup plain flour
• 1 tsp baking powder
• ½ cup good-quality cocoa
• Whatever you want to add! The version in the photo has 1/2 cup of frozen raspberries and 1/4 cup slivered almonds. Other versions I've done include a roughly chopped block of flavoured chocolate (peppermint, or coconut, or coffee). Have swirled 1/2 a cup of peanut butter through the batter before baking. Have mixed in 3/4 cup of caramels. Just have a rummage through the pantry and add whatever you want!
  

Oven at 180C or 350F

Melt the butter in a big saucepan, then take off the heat and stir in the sugar.

Briskly stir in the eggs, then add the sifted flour/cocoa powder/baking power.

Once all combined, add your 'extra' (see ingredients) and stir through.

Pour into brownie or slice tin, and bake for 15-20 minutes until a skewer comes out almost clean, but not quite. You want this a little bit chewy.

Note: if you're adding peanut butter or nutella for example, it's easier to swirl this through the top once the plan batter is in the pan.