Keto Apple Crumble Spice Cake | Low Carb, Sugar Free & Gluten Free

An apple crumble spiced cake cut in half with a fork inserted into the cake.

5 from 3 reviews

This 5 minute keto apple crumble spice cake is delightfully soft with a delicious brown sugar crumble and perfect apple spice flavor. It tastes far from sugar free, and this entire keto mug cake has only 4 NET CARBS!



Apple Spice Cake:

Heaping 1/3 Cup (42g) Almond Flour

2 Tbsps (20g) Confectioners Swerve

1/2 Tsp (2g) Baking Powder

Pinch of Cinnamon, Nutmeg, & Allspice

1 Egg, whisked

1/2 Tbsp (7g) Melted Salted Butter

1/2 Tsp Vanilla Extract

1/4 Tsp Apple Extract

Sugar Free Crumble: 

1 1/2 Tbsps (14g) Almond Flour

1 1/2 Tbsps (14g) Brown Swerve

1/2 Tbsp (7g) Melted Salted Butter

Pinch of Cinnamon, Nutmeg, Allspice


  1. First, make the cake. Add all of the dry ingredients for the cake to a small bowl and whisk until well combined.
  2. Add all the liquid ingredients to the bowl and mix with a spatula until a thick batter develops.
  3. Coat an 8 oz ramekin with baking spray and pour the batter into it.
  4. Microwave for 30 seconds, check on it, microwave it for another 10-15 seconds, and check again (It should be fully cooked at this point, but if it needs more time, continue cooking the cake in 5 second intervals). ***Alternatively, you can cook the cake in the oven at 350°F until a toothpick comes out clean from the center of it - about 15 minutes.
  5. Now make the crumble. Add all the crumble ingredients to a small bowl, mix until well combined, and then microwave for around 15 seconds.
  6. Stir the crumble ingredients together, coat the top of the cake with baking spray, and add the crumble to it. Dig in and enjoy!


The scale up function does not change the gram measurements.


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