Brown Butter, Ginger, and Sour Cream Coffee Cake

INGREDIENTS

• 1/2 cup chopped crystallized ginger
• 1 teaspoon kosher salt
• 1 tablespoon baking powder
• Unsalted butter (for pan)
• 3/4 teaspoon baking soda
• 2 cups plus 2 tablespoons (4 1/4 sticks; or more) unsalted butter
• 1 1/4 cups all-purpose flour
• 1 cup (packed) dark brown sugar
• 1/2 cup whole milk
• 1 teaspoon ground ginger
• 1 tablespoon vanilla extract
• 1 3/4 cups sugar
• 1 teaspoon ground cinnamon
• 1 1/2 cups sour cream
• 4 large eggs
• 3/4 cup whole wheat flour
• 1/2 teaspoon ground allspice
• 1/4 teaspoon kosher salt
• 2 cups all-purpose flour
• 3/4 cup almonds with skins, coarsely chopped