Honeyed Chestnut Corn Bread

Ingredients

• 2 cups yellow cornmeal
• 1 cup unbleached all-purpose flour
• 4 tsp baking powder
• 1 1/2 tsp coarse salt
• 1/2 tsp baking soda
• 1/2 cup unsalted butter, at room temperature
• 1/4 cup honey
• 2 tbsp packed golden brown sugar
• 4 large eggs, separated
• 1 cup vacuum-packed whole roasted chesnuts, coarsely chopped
• 1 tbsp chopped fresh thyme
• 1 cup buttermilk