Preheat the oven to 325 degrees. Spray a donut pan with cooking spray.

In a medium bowl combine all the ingredients for the topping. Mix well then set aside.

To make the donuts combine the flour, baking powder, salt, and cinnamon in a medium bowl. Mix well and set aside.

In another medium bowl cream together the sugar, egg, and butter. Add in the milk and vanilla and mix well.

Pour the flour mixture into the sugar mixture and mix until well combined.

Pour the donut mixture into a zip top bag. Seal the baggie then cut off the edge and pipe the mixture into the donut pan.

Sprinkle the crumble mixture on top of the donuts and lightly press down on it to make it stick.

Bake for 15 minutes. Remove the pan from the oven and allow to cool for 2 minutes.

Run a knife around the edges and remove the donuts from the pan. Cool completely on a wire rack.

In a small bowl combine the ingredients for the glaze. Drizzle over top of the donuts and serve.