Crumble mix

recipe url: 
https://www.bbc.co.uk/food/recipes/applecrumble_2971

300g/10┬Żoz plain flour, sieved
pinch of salt
175g/6oz brown sugar
200g/7oz unsalted butter at room temperature, cubed, plus a little for greasing

PG added
tsp Ginger powder 2 tsp cinnamon/canelle powder
1/2 tsp nutmeg