Preheat oven to 350°F. Butter two 9-inch round pans and line with parchment.
In a large bowl, whisk together all ingredients except add-ins. Gently stir until just combined—do not overmix. Fold in carrots and pecans.
Divide batter evenly between pans.
Bake 30–35 min, until a toothpick comes out clean. Cool completely.