No-Bake Chocolate Peanut Butter Bars

For the peanut butter layer:
Line an 8×8 baking pan with aluminium foil. Set aside.

Mix together melted butter, sugars, icing sugar, and peanut butter until well combined. Press the mixture into the prepared pan.

For the chocolate layer:
In the microwave, melt butter and chocolate together, stirring every 30 seconds. Pour over the peanut butter layer, and spread out evenly. Chill for at least 2–4 hours, or overnight.

Before cutting into squares, leave to stand at room temperature for 10 minutes.