This is a very simple throw it all together, the only thing you might not have in your frig is the buttermilk but you can remedy that by adding vinegar to milk.
Combine soften butter, sugar, 1/2 cup brown sugar and eggs. Beat till smooth. Add flour, baking soda , baking powder, salt, 1 tsp cinnamon, nutmeg and buttermilk. Beat until blended. Stir in nuts.
Combine remaining brown sugar and cinnamon and sprinkle on top. Cover and refrigerate overnight.
Bring to room temperature before baking.
Preheat oven to 350 degrees. Bake, uncovered, until a toothpick inserted in the middle comes out clean, 30 to 35 minutes.
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