Preheat oven to 400°F and grease a 9-inch cast iron skillet or 8x8 baking pan.
In a large bowl, whisk together 2 large eggs until well beaten.
Add 1/2 cup sour cream or plain Greek yogurt and mix until smooth.
Stir in 1/4 cup melted butter or vegetable oil until combined.
Pour in 1/3 cup whole milk or buttermilk and stir to incorporate.
Add 2 boxes Jiffy Corn Muffin Mix and fold in 2 tablespoons sugar or honey if using.
Mix just until combined, leaving some lumps in the batter. Do not overmix.
Pour batter into prepared pan and spread evenly with a spatula.
Bake for 25-30 minutes until golden brown and toothpick inserted in center comes out clean.
Brush tops with melted butter immediately after removing from oven. Cool 10 minutes before slicing.