Buttermilk coffee cake

Why I Love This Recipe
This has always been one of my favorite coffee cakes that my mom makes, and we recently discovered that it is even better made in a flat top bundt cake pan - it is another recipe that mom got while dad was in the navy
Ingredients You'll Need
1 c sugar
1 c brown sugar
3 c flour
1 c butter
1 t cinnamon
2 eggs
1 c buttermilk
1 t baking soda
glaze
2 T heavy cream
2 T melted butter
2 T vanilla
1 C powdered sugar
Directions
cut together sugars, flour, and butter
remove 1 cup of mixture and add to cinnamon, set aside for crumb topping
add baking soda. buttermilk and mix in eggs, stirring with a fork, don't worry, the batter will be lumpy at this point
Pour into 9x12 baking dish (or as we have started doing, use a bundt cake pan)
Sprinkle on crumb topping
Bake at 350 degrees for 40 minutes
Make glaze while cake is cooking
whisk together cream, butter, vanilla, and powdered sugar
While cake is still warm, drizzle on glaze