Preheat the oven 170C/ 325F/ GM3 and line a cupcake tray with 9-20 paper cake cases (mufin-sized).
Take 25 maraschino cherries out of a jar and allow to drain on kitchen paper.
Using electric beater, beat the butter and caster sugar together until light, fluffy and pale yellow in colour
Add the eggs, one at a time, beating well.
Add the vanilla extract and milk then beat again.
Sift the flour and baking powder into the bowl and gently stir in, using a large metal spoon until thoroughly combined. Take care not to overwork the batter though.
Chop each cherry into 16 pieces then gently fold the cherries through the cake batter.
Divide between the cupcake cases - filling each case around ⅔ full - and bake for approximately 20 minutes.
Test that the cupcakes are baked through: poke a cocktail stick into one of the cakes - if it comes out clean then the cakes are ready. If not, return to the oven for a couple more minutes, then test again.
Once out of the oven remove from the baking tin and allow to cool completely on a wire rack.