Apple Crumb Coffee Cake

Directions

1. 1
   Butter two 9-inch round cake pans; set aside.In the bowl of a stand mixer, combine the flour, yeast, sugar, and salt.
2. 2
   Mix in the milk, water, butter and baking emulsion. Beat in the egg and apple.
3. 3
   Mix on medium speed for 3 minutes, or until the dough is smooth and elastic (it will still be very wet).Divide the dough between the prepared cake pans.Prepare the crumb topping by combining the flour, walnuts, and spices.
4. 4
   Mix in the melted butter until the topping resembles wet sand.
5. 5
   Sprinkle the crumb topping in an even layer over both cakes. Cover and let rest in a warm place until doubles in size about 20 minutes if using Platinum yeast or 45 minutes if using instant yeast.
6. 6
   Bake at 350F for 30 minutes, or until a toothpick inserted into the center of the cake comes out clean.