small cakes with strawberry jam

ingredients:
60g butter
50g sugar
1 egg yolk
125g flour
1 pinch of yeast
Of strawberry jam
method:

mix the butter, sugar and egg yolk. Stir in the flour and baking powder and mix by hand until it no longer sticks.
Reward balls the size of a walnut, make a hollow with your finger and put a drop of jam (I put the end of cooking after the cakes have cooled).
Place on a baking sheet and bake 10-15 minutes at 180 ° C.
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