Ham and Cheese Biscuits

Bahan-bahan (18 porsi)

• 2½ cups all-purpose flour*
• 1 tablespoon baking powder
• 1 tablespoon sugar
• ½ cup butter (cold and grated)
• 1 cup milk
• 1 large egg
• 2 cups shredded cheddar cheese
• 1 cup finely diced cooked ham
• ¼ cup very thinly sliced green onions
• 1½ cups brown rice flour (plus up to ¼ cup additional ONLY as needed)
• ½ cup oat flour
• ⅓ cup tapioca starch
• ¼ cup potato starch
• 2 teaspoons xanthan gum