Gather all your equipment and ingredients then preheat your oven to 350℉/180℃ and grease a 9x9 inch square baking dish with butter or neutral oil, or line with parchment paper
In a medium bowl, mix together the cornmeal and milk and set the mixture aside for at least 10-15 minutes (see Note 4)
In a medium bowl, whisk together the flour, baking powder and salt
In another large bowl, whisk together the sugar, eggs, Greek yogurt, honey and butter until smooth
Add the dry ingredients and the cornmeal and milk mixture to the wet ingredients and mix with a spatula until smooth and just combined (a few small lumps in the batter are okay)
Fold the diced jalapeños into the batter
Transfer the batter to the prepared baking dish (it will be fairly thin and should be easy to pour)
Top with the slices of jalapeño to garnish
Bake for 35-30 minutes or until a toothpick inserted in the center comes out clean and the edges are golden brown
While the cornbread cools, make the honey butter; in a heatproof bowl, mix together the melted butter, honey and salt until smooth
When the cornbread has mostly cooled, brush or pour the honey butter all over the top then cut into squares and serve