Start by preheating your oven to (400°F) = (204°C). Grease a 9-inch by 13-inch baking pan with butter.
Then, drain the frozen peaches.
Grab a bowl and combine the drained peaches, sugar, flour, lemon juice, and the salt. Stir until covered and set aside.
Combine the flour, sugar, and baking powder, stir until mixed.
Now, cut in the butter and the shortening with a pastry cutter.
Beat the eggs and milk together. Pour the egg mixture into the flour mixture and stir with a fork until combined.
Place the peach mixture into the buttered baking pan.
Then, place dollops of the cobbler topping onto the peaches. Make it as evenly as possible to make that "cobbled" look. Sprinkle additional sugar on top of the cobbler.
Bake for 30-35 minutes or until golden brown.
Let the cobbler rest for 10-15 minutes before you serve it.
Serve with a scoop of vanilla ice cream or a dollop of freshly whipped cream.