Preheat the oven to 350 degrees F. Line a baking sheet with a silicone baking mat or parchment paper (or simply spray the sheet with nonstick spray).
In a large mixing bowl, pour in your keto cake mix. Create a well in the center, then pour in the melted (but cooled!) butter or oil as well as the eggs, lemon extract, juice, and zest.
Using a whisk, begin beating the eggs and mixing the liquids, carefully incorporating the cake mix as you work. The mixture gets nice and thick. Once there are no pockets of unmixed flour, place dough in fridge to chill for 10-30 minutes. Do not overmix.
Once chilled, scoop out the dough into 24 pieces using a small ice cream scoop. Roll the pieces of cookie dough into perfect spheres, then place them at least 2 inches away from one another on the baking sheet. Gently press the tops of the cookie dough with a spoon, slightly flattening the top of the dough.
Bake cookies for 10-12 minutes. Remove from oven, then allow to continue cooking on the hot pan for 5-10 minutes before removing.
In a small bowl, mix together the confectioners sweetener and lemon juice until it reaches a smooth consistency. You can drizzle this on in pretty stripes, or you could thin it out with water and pour directly over each cookie to coat it in a tasty, lemony glaze.
Allow glaze to set for at least 30 minutes before touching to prevent any fingerprints from messing up your decorations.