Just chuck everything in the food processor! It was quick to whip these up for a play date. This recipe is from Bake Me Home (HarperCollins, 2015) by Alice Arndell.

Makes 12
150g softened butter
2/3 c sugar
1 1/2 flour
2 tsp baking powder
1/2 tsp salt
2 eggs
1 tbsp milk, or more
1 tbsp vanilla extract
food colouring

Preheat oven to 180C. Line a 12-cup muffin tin with paper cases.
Put all the ingredients except food colouring in a food processor and mix until light and fluffy.
Transfer batter evenly into 3 bowls. Colour each one with your desired food colourings.
Spoon about a tbsp of each colour into the muffin tins. Swirl colours together with a skewer.
Bake for 15-18 minutes until cooked through, they should spring back when lightly touched. Cool in the tin for a few minutes then transfer to a wire rack to cool completely.
The cupcakes are delicious as they are but you can also ice with buttercream or a simple icing sugar and lemon juice drizzle.