Buns 150 ml milk 2 tsp instant yeast (2.25 tsp active-dry yeast, 17.5g fresh yeast) 1 large egg 1 egg yolk 50 grams sugar 1/2 tsp vanilla extract 1/2 tsp ground cardamom 1/2 tsp salt 375 grams all-purpose or bread flour 57 grams unsalted butter, softened Filling 71 grams unsalted butter, softened 65 grams brown sugar 1.5 tsp ground cardamom Pinch of salt