Preheat the oven to 160/140 fan/gas mark 3.

In a large bowl, whisk together the almond butter, maple syrup, egg, coconut oil and vanilla.

Stir in the cocoa powder and baking powder.

Pour the batter into a prepared 9-inch baking pan.

Bake for 20-23 minutes, until the brownie is done, but still soft in the middle and a skewer comes out clean.