Step 1 of 9
Old-Fashioned Coffee Cake
Preheat the oven to 350°F.
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Step 2 of 9
Old-Fashioned Coffee Cake
Spray a standard-size tube pan liberally with nonstick cooking spray. Set aside.
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Step 3 of 9
Old-Fashioned Coffee Cake
Place the butter, sugar, and vanilla in a large mixing bowl. Use a hand mixer to cream the ingredients together on medium-high speed until smooth, 1-2 minutes. Add the eggs, sour cream, and buttermilk, and continue beating until the mixture is light and fluffy, about 1 minute.
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Step 4 of 9
Old-Fashioned Coffee Cake
Sift the flour, baking powder, baking soda, salt, and nutmeg into the bowl. Mix on low speed, scraping down the sides of the bowl with a rubber spatula as needed, until a smooth, thick batter forms.
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Step 5 of 9
Old-Fashioned Coffee Cake
Place the sugar, cinnamon, salt, and chopped nuts (if using) in a small mixing bowl and stir to combine.
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Step 6 of 9
Old-Fashioned Coffee Cake
Pour half the batter into the prepared pan and smooth it into an even layer. Sprinkle the cinnamon-sugar mixture evenly over the batter. Pour the remaining batter into the pan and smooth it into an even layer.
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Step 7 of 9
Old-Fashioned Coffee Cake
Bake the coffee cake on middle rack of oven until a toothpick inserted in the center comes out clean, 50-65 minutes.
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Step 8 of 9
Old-Fashioned Coffee Cake
Check to see that coffee cake is done. Remove from oven or add time as needed.
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Step 9 of 9
Old-Fashioned Coffee Cake
Let the cake rest in the pan for 20 minutes, then carefully lift the cake from the outer pan. Allow to cool completely for 1-2 hours before slicing and serving. To store, cover tightly with aluminum foil or plastic wrap and keep at room temperature for 1-2 days, refrigerate for up to a week, or freeze for up to 2-3 months.