Preheat the oven to 375. Line a 8 by 8 inch sqare baking pan with foil extending foil over sides for easy removing of bars. Spray foil with bakers spray
In a bowl combine berries sugar, cornstarch, lemon juice, zest and salt until all berries are coated
In another bowl whisk the flour, baking powder, cinnamon and the 1/2 cup of the granulated sugar, cut in the butter, vanilla and egg yolk and mix with a fork or pulse in the food processor until it looks like fine crumbs
Press about 2/3 of the crumbs into the prepared pan, packing down to form a crust
Add your berries evenly over crust
Add the brown sugar to the remaining crums and mix with a fork
Crumble over berries and bake about 45 minutes until top is golden and fruit is bubbling. Cool completely in pan on rack
Lift out by lifting foil and removing the crumble whole
Make Glazes
For White Chocolate glaze, have chopped chocolate. In a bowl. Heat cream until hot but not boiling, pour over chocolate and stir until smooth
For milk chocolate glaze. Have chopped chocolate in a bowl. Heat cream until hot but not boiling and pour over chicolate. Stir smooth
Drizzle bars with glaze, when glaze sets, cut into bars
