Step 4: Baking Time!
-Prep the 13x9 baking pan w/ cooking spray
-Pour 1/2 of the cake mix in the pan and add 1/2 of the streusel. Repeat this step once again to make another layer.
-Place pan in over (middle rack) and bake at 350 degrees for 40-50 minutes. (yes, quite a broad time span, but it varies from ovens)
-(optional) test with toothpick by dipping it in and if it comes up clean, you're good to go.
-After the timer goes off, remove from pan with a hot pad .