Salted caramel chocolate cupcakes - Moje wypieki

Ingredients

• 100 g butter
• 110 g caster sugar
• 50 g light brown sugar
• 1 teaspoon vanilla extract
• 2 large eggs
• 120 g plain flour
• 40 g cocoa powder
• ¾ teaspoon baking powder
• ½ teaspoon bicarbonate of soda
• 120 ml kefir or buttermilk
• 1 cup sugar
• 4 tablespoons water
• 120 ml double cream
• 30 g butter
• a generous pinch of salt
• a handful of popcorn kernels
• oil
• salt
• 125 g butter
• 180 g icing sugar
• 180 g cream cheese
• 80 g salted caramel (from above)