Breakfast Biscuit Sandwiches

Name: Breakfast Biscuit Sandwiches
Ingredients: 4 cups all-purpose flour, plus more for dusting; 2 tablespoons kosher salt; 1 1/2 tablespoons baking powder; 1 teaspoon baking soda; 2 sticks unsalted butter, cubed and chilled, plus more for spreading; 1 1/2 cups buttermilk; 10 ounces sliced country ham, for serving; 10 ounces sliced cheddar cheese, for serving; 10 fried eggs, for serving; Raspberry jam, for serving (optional)