Let the oven preheat at 300°F.
Crack the eggs in a bowl. Whisk along with the sweetener and butter. Continue whisking until you have a uniform mixture.
Include some optional flavors like salt, vanilla, and cocoa powder in the mixture if preferred. Line a baking sheet with waxed paper. Scoop out a spoonful of the batter and form this into cookies on the sheet. Leave to bake for 15 minutes.