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IngredientsSea LevelBoone, NC (3,000 ft)Denver, CO (5,000 ft)Santa Fe, NM (7,000 ft)Breckenridge, CO (10,000 ft)

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OvenRack in lower third of oven; 325F; 35-45 minutesRack in center of oven; 375F; 25-27 minutesRack in lower third of oven; 375F; 25-30 minutesRack in lower third of oven; 350F; 30-32 minutesRack in lower third of oven; 350F; 32-35 minutes

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Unsweetened chocolate4 oz4 oz4 oz4 oz4 oz

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Sifted all-purpose flour2 cups2 cups plus 2T2 cups plus 3T2 cups plus 3T2 cups plus 2T unsifted flour

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Baking soda1 1/2 tsp1 1/4 tsp plus 1/8 tsp1 1/4 tsp1 tsp1/2 tsp

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Salt1/4 tsp1/2 tsp1/2 tsp1/2 tsp1/2 tsp

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Ground nutmeg1/4 tsp1/4 tsp1/4 tsp1/4 tsp1/4 tsp

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Unsalted butter, at room temp.2 sticks2 sticks2 sticks2 sticks1 1/4 sticks

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Sugar1 3/4 cups1 1/2 cups plus 3T1 1/2 cups plus 3T1 1/2 cups plus 2T1 1/2 cups plus 3T

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Vanilla extract1 tsp1 tsp1 tsp1 tsp1 1/2 tsp

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Eggs44445, plus 1 yolk

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Buttermilk1 1/3 cups1 1/2 cups1 1/2 cups1 1/2 cups plus 2T1 1/2 cups