Chocolate Chip Mug Cake

• unsalted butter↗15g g
• soft light‑brown sugar↗15g g
• egg yolk↗1

  freeze the white for another recipe

• vanilla extract↗¼ tsp tsp
• plain flour↗25g g
• baking powder
• milk chocolate chips↗15g g
• ice cream

  for serving (optional)

Step-by-step instructions

1. 1

   Place the butter and sugar in a microwave‑safe mug or ramekin and cook on high power for 30‑50 seconds (longer if using cold butter from the fridge), until melted.

2. 2

   Stir the yolk until glossy and homogeneous. Add a pinch of salt and vanilla. Add the flour, baking powder and chocolate chips. Microwave on high power for 1 minute, until it rises and becomes golden. Remove and let stand for a few minutes before serving with ice cream, if desired.