Custardy Fruit Squares - Full Belly Farm

Ingredients

• 3 medium quince, pears, or juicy, sweet apples, such as Gala or Fuji, peeled
• 1/2 cup (68 grams) all-purpose flour
• 1 teaspoon baking powder
• 2 large eggs, at room temperature
• 1/3 cup (67 grams) sugar
• Pinch of fine sea salt
• 2 teaspoons pure vanilla extract
• 6 tablespoons whole milk, at room temperature
• 2 tablespoons (1 ounce; 28 grams) unsalted butter, melted and cooled