Start by preheating your oven to 350°F (175°C). It helps set the right temperature for baking later.
Cream the butter and cane sugar in a big bowl until they look light and fluffy. It might take a couple minutes, so be patient.
Beat in the eggs one at a time, then add vanilla extract and whole milk for that rich flavor.
In another bowl, whisk the flour, baking powder, and sea salt together so they’re really mixed.
Slowly add the dry ingredients to the wet stuff, mixing just enough so it’s combined and not overworked.
Fold the Jello mix into the dough so it spreads evenly. This is where the fun begins.
Drop rounded spoonfuls of dough onto a parchment-lined baking sheet, spacing them so they don’t stick together.
Bake for 10-12 minutes until edges turn light golden. Use quick release to open the oven and check them to avoid overbaking. Let cool a bit before moving to a wire rack.
Notes
Once they’ve cooled completely, you can store the cookies in an airtight container on the counter.