Strawberry-Raspberry Cobbler

Ingredients

• Fruit

  • 4 cups (540 g) fresh strawberries, sliced (see note)
  • 4 cups (540 g) fresh raspberries
  • 3/4 cup (160 g) sugar
  • 4 tsp cornstarch

• Dough

  • 1 1/2 cups (225 g) unbleached all-purpose flour
  • 1/3 cup (70 g) sugar, plus more for sprinkling
  • 2 tsp baking powder
  • 1/2 tsp baking soda
  • 1/4 tsp salt
  • 1/2 cup (115 g) cold unsalted butter, diced
  • 3/4 cup (180 ml) 10% yogurt
  • Milk, for brushing