Set 24-30 charcoal briquettes to fire. Let them heat until they are hot and ready.
Set a 12-inch camp cast iron Dutch oven over 24-30 hot-and-ready charcoal briquettes.
Add the stick of butter to the Dutch oven. We need this to be fry-ready. Careful!! DON’T BURN THE BUTTER.
As soon as you put the butter in the Dutch oven, mix the dry ingredients with 2 cups of milk. Use a mixing bowl to stir them together very well. This is our cobbler batter.
Once the butter is hot and fry-ready, pour the batter into the Dutch oven and over the butter. It’ll be bubbling around the edges.
Once the batter is in the Dutch oven, add the wet ingredients to the top of the batter. DO NOT MIX the wet ingredients in with the batter; just evenly add, drop, or spread the berry mixture to the top of the batter.
Return the lid to the Dutch oven and remove the Dutch oven from the hot charcoal briquettes. Add 16 hot briquettes to the top of the Dutch oven and set the Dutch oven over 8 hot briquettes. (24 total briquettes: 16 on the lid and 8 under the oven).
Let this bake for 10-minutes. Then, turn the Dutch oven: Turn the lid 1/3rd turn in one direction and the whole pot 1/3rd of a turn in the other direction.
Let this bake for another 10-minutes (20-minutes) total. Visually check the cobbler.
If you feel the cobbler needs more time, return the lid to the pot and give the pot another turn. Wait five minutes and check again. Do this every five minutes until the cobbler is done.