Preheat the oven to 180C/350F/Gas 4 and line a cupcake tin with 10 paper cases. To make the jam, add the raspberries and honey to a pan and set over a medium heat. Simmer for 5 minutes, mashing the raspberries to release their liquid. Stir in the chia seeds and continue to simmer for 15 minutes until thick and viscous. Remove from the heat and leave to cool.
Meanwhile, in a large bowl cream together the butter or coconut oil and sugar until light and fluffy. Beat in the peanut butter and eggs, then fold in the flour, baking powder and milk. Divide the mixture between the paper cases and bake for 16-20 minutes until risen and golden. A skewer inserted into the centre of a cupcake should come out clean. Leave for 10 minutes, then transfer to a cooling rack and leave to cool completely.
To make the icing, combine the cream cheese, peanut butter and honey until smooth. Cover and refrigerate until needed.
Once the cupcakes have cooled, cut out a small thumb-size hole from the centre of each one. The excess bits of cake can be eaten as a snack while you assemble your cupcakes!
Fill each hole with a teaspoon of the raspberry chia jam. Keep any remaining jam in a jar in the fridge. Top each cupcake with a tablespoonful of the icing, then position a raspberry on top of each one.