Preparation method

1. Preheat the oven to 180C/350F/Gas 4 and line a muffin tin with paper cases.
2. Crumble two-thirds of the grilled pancetta onto a baking tray lined with baking parchment and cover with the melted chocolate. Allow to set before chopping into bacon chocolate chips.
3. Sift together the flour, cocoa powder, sugar, bicarbonate of soda, baking powder and salt into a bowl and mix well.
4. In another bowl beat the eggs, coffee, soured cream and vegetable oil until well combined, and stir this into the dry ingredients. Stir in the bacon chocolate chips.
5. Spoon the mixture into about 20 muffin cases, bake for 20-25 minutes.
6. For the buttercream icing, whisk together the butter and icing sugar. Fold in the melted chocolate.
7. Remove the cupcakes from the oven and allow to cool before piping the icing onto the cupcakes. Top with the remaining bacon pieces and a sprinkling of sea salt.