Preheat oven to 350 degrees F. Grease and flour 2 8-inch or 9-inch round cake pans. Set aside.
In a small bowl, mix all strudel ingredients until well blended. Set aside.
Lightly spoon flour into measuring cup and level up. In large bowl, combine flour and remaining cake ingredients until moistened, at low speed. Beat 2 minutes longer at medium speed.
Spread 1/4 of the batter into each pan. Sprinkle 1/4 of the streusel over batter in each pan then top each with remaining batter. Sprinkle remaining topping over each pan.
Bake at 350 degrees for 20 to 30 minutes or until toothpick comes out clean.
While cooling, mix glaze in small bowl until drizzling consistency. Start with 1 tablespoon of water and add more if needed. Drizzle over warm cakes.
Notes
You could also bake this in a 9 x 13 pan. Bake for 25 - 35 minutes or until toothpick tests clean.