Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a muffin tin or line with paper muffin liners.

Step 2

Mix sweetener, almond flour, coconut flour, poppy seeds, lemon zest, baking powder, salt, and xanthan gum together in a bowl.

Step 3

Beat eggs in a bowl with an electric mixer on high speed until fluffy, about 2 minutes. Beat in butter, sour cream, and vanilla extract. Add sweetener mixture. Stir in cream slowly until batter is thick and smooth. Pour into prepared muffin tin.

Step 4

Bake in the preheated oven until tops are golden, 15 to 20 minutes.