Place the butter and sugar in the bowl and use the dual whisk on Auto to cream the butter and sugar together until light and fluffy (approximately 2 minutes).
Add the eggs, one at a time, mixing well after each addition.
Add the flour to the bowl and use the folding tool on low speed (speed 1 - 2) to mix in the flour.
Carefully spoon the mix into cases and bake in a preheated oven for 15- 20 minutes at 180°C/350°F/Gas mark 4.