Preheat your oven to 180 Fan / 200 C / 400 F / Gas 6 and line a muffin tin with
In a bowl or jug whisk together the milk, vinegar, yoghurt and oil
In a large bowl mix together the flour, sugar, bicarb and baking powder
Gently warm the biscoff spread for the cupcakes in a microwave or saucepan - you just want it liquid enough to whisk into the milk
Add the warmed Biscoff spread to the milk mixture then add the wet ingredients to the bowl of dry
Mix well using a spatula, stir up from the bottom of the bowl to make sure there are no flour 'pockets'
Scoop into your muffin cases filling each one roughly 3/4 full
Bake for 25 minutes - they should be well risen, golden and springy to the touch. To check if they're cooked insert a cocktail stick into the centre of one of the cupcakes - if it comes out clean with no raw cake clinging to it they're done, otherwise return to the oven for a few minutes
Leave the cooked cupcakes in the tin for 5-10 minutes then lift out onto a wire rack to cool completely
To make the buttercream frosting use a stand mixer with the paddle attachment to beat together the butter, icing sugar and Biscoff spread until pale and fluffy
Spoon the buttercream into a piping bag fitted with a star nozzle then pipe tall swirls on top of each cupcake
Nestle a Biscoff biscuit into the icing
Store the cupcakes in an airtight container
Notes
The cupcakes can be frozen either plain or decorated though I would recommend removing the cookies before freezing
Recipe by The Cook & Him at https://thecookandhim.com/recipes/biscoff-cupcakes/