Maple Oatmeal Princess Coffee Cake

INGREDIENTS

• 1/2 teaspoon baking powder
• 1/3 cup maple syrup (grade B or dark amber grade A)
• 1/4 teaspoon salt
• 1/2 cup packed light brown sugar
• 1/2 cup sweetened shredded coconut, lightly packed
• 1/4 cup unsalted butter, softened
• 1/2 teaspoon baking soda
• 1/4 cup unsalted butter
• 1/2 teaspoon vanilla extract
• 1 large egg
• 1/2 cup old-fashioned rolled oats
• 1/3 cup chopped toasted pecans
• 3/4 cups all-purpose flour
• 2/3 cups boiling water
• 2 tablespoons créme fraîche or sour cream
• 3/4 teaspoons ground mace or freshly grated nutmeg