Preheat oven to 350F degrees. Gather your ingredients so that you have everything close at hand on the counter or table. Prepare a coffee cake pan by spraying it with Baker's Joy or by using shortening and flour.
Prepare the Cinnamon Pecan Mixture
Using a knife and cutting board or a nut chopper, coarsely chop the pecans and place in a small bowl.
Add 1/2 cup granulated sugar and cinnamon to the pecans. Stir to combine. Set aside until ready to use.
Prepare the Cake
In large mixing bowl, cream together the softened butter and 2 cups granulated sugar until fluffy. Mix in the vanilla extract.
Add large eggs, one at a time, beating well after each addition.
In a small bowl, combine the all-purpose flour, baking powder, baking soda and salt.
Add in the flour mixture, alternately with the sour cream, beating after each addition.
Assemble the Coffee Cake
Spoon 1/3 batter into a greased 10" tube pan. Sprinkle 1/3 of cinnamon mixture over batter. Repeat layers two more times ending with the cinnamon and pecans.
Bake in preheated oven for 60-70 minutes or until cake tests done, using a toothpick inserted into the center that comes out clean.
Cool for 10 minutes. Remove from pan to a wire rack to cool completely. Serves 16.
Notes
*Unless otherwise indicated, all butter used on this recipe site is salted.