Prepare pears. In a bowl, toss the sliced pears with the granulated sugar, vanilla extract, and ground cinnamon. Set aside.
Preheat and melt butter. Preheat the oven to 325°F. Place the butter in a 9x13-inch baking dish and set it in the oven until melted. Do not let it brown.
Mix dry topping. In a mixing bowl, whisk together the flour, baking powder, cinnamon, nutmeg, ground ginger, granulated sugar, brown sugar, and salt.
Add wet ingredients. In a separate bowl, whisk together the egg, milk, and vanilla extract. Add to the dry ingredients and stir just until combined.
Assemble. Pour the batter evenly over the melted butter in the baking dish. Do not stir. Spoon the pear mixture evenly over the batter. Do not stir.
Bake. Bake for 50 to 60 minutes, or until the pears are tender and the topping is cooked through. Loosely cover with foil if the top browns too quickly.
Cool. Let the cobbler cool before serving. The pear syrup will thicken as it rests.
Notes
Texture. The batter will rise and surround the pears as it bakes.
Sweetness. Adjust the sugar slightly depending on how ripe and sweet the pears are.
Fruit swaps. Thinly sliced apples can be mixed with the pears for added flavor.
Peeling. Peeling pears is optional, but peeled pears create a softer texture.
Pear varieties. Bartlett, Bosc, and Anjou work well. Mixing varieties adds depth.
Storage. Store covered at room temperature for up to 2 days or refrigerate for up to 5 days.