2cupsall-purpose flour (may use your favorite gluten-free substitute)
1teaspoonbaking powder
1teaspoonbaking soda
1teaspoonground nutmeg (freshly grated if possible)
1/2teaspoonkosher salt
1cupregular sour cream (not fat-free)
2/3cuppacked brown sugar
1/2cupchopped pecans
1teaspoonground cinnamon
Instructions
Beat the butter and granulated sugar at medium speed with an electric mixer until light and fluffy. Add the eggs, one at a time, beating just until blended after each addition.
Combine the flour, baking powder, baking soda, nutmeg and salt; add to the butter mixture alternately with the sour cream, beginning and ending with flour mixture. Beat at low speed just until blended after each addition. Spread the batter into a greased 13x9-inch pan.
For the topping, stir together the brown sugar, pecans and cinnamon; sprinkle over the batter. Cover the baking dish with plastic wrap and chill up to 18 hours.(Optionally, you may bake right away.)
When ready to bake, allow the coffee cake to sit on the counter while the oven preheats to 350 degrees F. Bake for 30 minutes, give or take a few minutes depending on oven, or until the center is just cooked through. To ensure a moist, tender cake, be careful not to over bake. Serve warm or at room temperature.