Brioche slice with crumble

Crumble

• 70 g plain flour
• 50 g white sugar
• 2 tsp vanilla sugar
• 50 g unsalted butter

Dough

• 220 g full cream milk
• 40 g fresh yeast or 3 tsp dried instant yeast
• 100 g white sugar
• 1 tsp vanilla sugar
• 500 g plain flour
• 100 g unsalted butter cut into cubes, plus extra for greasing
• 2 eggs
• ½ tsp sea salt
• 250 - 300 g seasonal fruit (e.g. blueberries, strawberries, rhubarb), cut into pieces, or jam