Step 1: Preheat your oven to 350°F (175°C) and grease a 9-inch springform or round cake pan. Dust lightly with flour.
Step 2: In a medium bowl, whisk together the flour, baking powder, baking soda, cinnamon, nutmeg, and salt. Set aside.
Step 3: In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy, about 3-5 minutes.
Step 4: Add the eggs one at a time, beating well after each addition. Stir in the sour cream, 1/4 cup maple syrup, and vanilla extract.
Step 5: Gradually add the dry ingredients to the wet ingredients, mixing just until combined. Gently fold in the diced pears.
Step 6: Pour the batter into the prepared pan and smooth the top. Bake for 45-55 minutes, or until a toothpick inserted into the center comes out clean.
Step 7: While the cake bakes, prepare the glaze by simmering 1/2 cup maple syrup and 2 tablespoons butter in a small saucepan over medium heat for 3-5 minutes. Stir in the cream and remove from heat.
Step 8: Allow the cake to cool in the pan for 10 minutes, then pour the warm glaze over the top. Let it cool completely before serving.