For the Peach Layer:
425 gTinned peach halves in syrup
50 gUnsalted butter
75 gLight brown sugar
For the Cake Batter:
180 gAll-purpose flour
1½ teaspoonsBaking powder
½ teaspoonGround cardamom
a pinchSalt
100 gUnsalted butter (softened)
120 gCastor sugar
2 largeEggs
1 teaspoonVanilla extract
3 tablespoonsPeach syrup (from the tin)
3 tablespoonsMilk