In a 10-inch cast-iron skillet, combine strawberries, cornstarch, and ½ cup (100 grams) sugar. Cook over medium heat until bubbly and thickened, 3 to 4 minutes. Remove from heat, and stir in ¼ cup (57 grams) butter and apples.
In a medium bowl, whisk together flour, baking powder, and remaining ½ cup (100 grams) sugar. Using a pastry blender or 2 forks, cut in remaining ¼ cup (57 grams) butter until mixture is crumbly. Gradually add cream and vanilla, stirring just until dry ingredients are moistened. Divide dough into 5 equal portions, and drop on top of cobbler (Dough will be wet.)
Bake until browned and bubbly, about 25 minutes, covering with foil halfway through baking to prevent excess browning, if necessary.
Recipe by Bake from Scratch at https://staging.bakefromscratch.com/strawberry-apple-cobbler/