• Preheat the oven to 350 degrees F.

For the Filling:

• Wash and dry plums. Cut in half then remove the pit and discard. Slice the halves into quarters, or wedges. Toss them into a mixing bowl, or straight into a 10 inch cast iron skillet or an 11 x 7 inch casserole dish.
• Sprinkle the granulated sugar, brown sugar, cornstarch, lemon juice, cinnamon and nutmeg over top of the plums. Mix well with a wooden spoon.

For the Topping:

• In a medium mixing bowl, combine the flour, granulated sugar, brown sugar, baking powder, salt, cinnamon and nutmeg. Whisk it all together. Add the cold butter and use a pastry cutter or fork to work the butter into the dry ingredients. Then add the milk and stir until thoroughly combined. Randomly toss small batches of the topping over top of the fruit mixture. It doesn't have to cover the whole cobbler. You can leave some fruit exposed.
• Place the cobbler in the preheated 350 degree F oven, and bake for about 35 to 35 minutes, or until topping is golden brown.
• Carefully remove from the oven.
• Scoop cobbler into bowls and top with ice cream or whipped cream, or both!
• Serve!