This simple, speedy brownie recipe ... a microwave-safe mug. Microwave on high (800W) in 20-second bursts, until the chocolate and butter have melted and stir together. Mix the milk into the ...

Transfer to a bowl with the melted butter and mix until it resembles ... and flatten with the back of a mug. Transfer to the fridge to set while you make the brownie. To make the brownie, put ...