I’ve named these “old school” since they are the cake-like sweet and tender muffins that are more of a treat than a functionally nutritious breakfast item (but we love them all the same).
Preheat the oven to 375°F (190°C), and grease 2 muffin tins or line 18 cups with paper liners.
In a large mixing bowl, whisk the sugar, yogurt, eggs, oil, melted butter, vanilla, and orange zest together. In a separate bowl, sift the flour, baking powd