There is no way to improve on this smitten kitchen recipe so I'm not even going to try but I do want to put it here so I know where it is for the next batch of farm apples I end up with.
1/2 cup unsalted butter
1 cup gluten free flour
1 cup sugar, divided
1 1/2 teaspoons baking powder
1/2 teaspoon fine sea or table salt
3/4 cup oat milk
2 medium apples, peeled
3 small or 2 medium plums, no need to peel
3/4 teaspoon ground cinnamon
Heat your oven to 350°F. Place butter in a square cake pan. Place pan in oven for 5 to 7 minutes, until butter has melted. Tilt the dish to ensure it is evenly coated with butter.
Whisk together the flour, 3/4 cup sugar, baking powder and salt in a small bowl and stir in milk. Mix until smooth. Pour batter over the butter but do not stir, even if it looks like a puddle-y buttery mess.
Cut apples into 8 wedges, small plums into 4 wedges and medium ones into 4 to 6. Space fruit over batter. Sprinkle with cinnamon and then remaining sugar.
Bake the cobbler until it is set and golden on top, 35 to 40 minutes. Cool slightly on a rack. Serve the cobbler warm or at room temperature.
From Smitten Kitchen