Preheat oven to 400 degrees F.
Mix biscuit mix, sugar, salt, cinnamon, eggs, milk, melted butter, and orange peel. Add plumped raisins or currants.
Grease 12 muffin cups or line with paper baking cups. Fill cups 2/3 full.
Bake for 15 to 18 minutes.
Make vanilla icing and drizzle or pipe over muffins to make cross shapes. Makes 12 hot cross muffins.