Preheat your oven to 400°F (200°C) and grease a mini muffin tin or line it with mini muffin liners.
In a large mixing bowl, combine the cornmeal, flour, baking powder, salt, and sugar. Mix well to combine.
In a separate bowl, whisk together the egg, buttermilk, and melted butter until smooth.
Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix.
Gently fold in the corn kernels.
Spoon the batter into the prepared mini muffin tin, filling each cup about 2/3 full.
Bake for 12-15 minutes, or until the tops are golden brown and a toothpick inserted in the center comes out clean.
While the cornbread poppers are baking, prepare the honey butter by mixing the softened butter, honey, and cinnamon (if using) in a small bowl until well combined.
Once the cornbread poppers are done, remove them from the oven and let them cool for a few minutes before transferring them to a wire rack.
Serve warm with the honey butter spread on top.