Passover Crumb Cake

Another amazing Passover cake! Recipe courtesy of Susie Fishbein's Passover By Design cookbook.

Ingredients:
nonstick cooking spray
1 cup sugar
1 cup brown sugar
1 teaspoon baking powder
1 tablespoon vanilla sugar
1 cup vegetable oil
4 large eggs
1 cup potato starch

Crumb Topping:
2 teaspoons ground cinnamon
4 tablespoons (1/2 stick) butter or margarine, cut into small bits
3/4 (5.5-ounce) box vanilla cookies, crushed and crumbled (I used a food processor)
1/4 cup brown sugar
1/4 cup sugar

Directions:

Preheat oven to 350°F.

Spray a 9- by- 13-inch baking pan with nonstick cooking spray. Set aside.

In the bowl of a stand mixer, at medium speed, mix the sugar, brown sugar, baking powder, vanilla sugar, oil, eggs, and potato starch until you have a smooth batter.

Pour into prepared pan and bake, uncovered, for 20 minutes.

In a medium bowl, toss the cinnamon, butter or margarine, crushed cookies, brown sugar, and sugar. Use your fingers to pinch into coarse crumbs.

Sprinkle the crumbs on top of the cake and return to the oven to bake for an additional 35 minutes.