Preheat your oven to 180°C/350°F and grease two 8-inch round cake pans. Line with baking parchment paper is optional but recommended.
Mix all the sugar-free cake batter ingredients together in a large mixing bowl.
Divide the birthday cake batter evenly between the two cake pans.
Bake on the center rack of the oven for 12-15 minutes or until done. Place the cake on a wire cooling rack or towel and let cool completely.
Sugar-free frosting (optional)
While the cake is cooling make the whip cream frosting by whipping all the frosting ingredients together in a bowl. Mix with an electric hand mixer or stick blender until stiff peaks form. Place the frosting in the refrigerator until ready to use.
Once the cake is cooled remove it from the pan and place one layer on your serving tray or cake stand. Spread 1/4 of the frosting over the top of the cake. Then place the 2nd layer on top. Frost the cake top and sides with the remaining frosting and top with sugar-free sprinkles if desired. Store cake in the refrigerator until ready to serve.
Notes
Sugar-free sprinkles are optional, but really help the cake come alive and look like a regular birthday cake.[eafl id="45270" name="Sugar-free sprinkles" text="Sugar-free sprinkles"] are an additional 1g net carbs per serving.You can also use sugar-free vanilla cream cheese frosting or chocolate frosting.