Chocolate cheesecake muffins - Penguin Books Australia

Ingredients

• 125g unsalted butter, at room temperature
• 150g soft light brown sugar
• 1 egg
• 1 tsp vanilla extract
• 175ml soured cream or natural yoghurt
• ½ tsp bicarbonate of soda
• ¼ tsp sea salt
• 50g cocoa powder
• 275g self-raising flour
• 175ml whole milk
• 250g milk chocolate chips