Keto Custard is one of the most logical ketogenic desserts to make, yet it can be surprisingly tricky to perfect. Achieving the silky, spoonable texture custard is known for takes attention to temperature, a few careful steps, and quality ingredients. This version focuses on classic vanilla flavour, a rich cream base, and simple low‑carb ingredients to create a smooth, satisfying keto vanilla custard you’ll want to serve all year round.

Keto Vanilla Custard — Overview
This easy vanilla custard recipe uses a small number of ingredients yet delivers a creamy, comforting dessert. It’s ideal on its own, spooned over fresh berries, or used as a base for low‑carb ice cream. The recipe keeps carbs low while remaining indulgent thanks to the cream and egg yolks that set the custard without starches.
The method is straightforward: warm the dairy with vanilla, temper the egg yolks with the hot liquid, then cook gently until the mixture coats the back of a spoon. Xanthan gum is included for extra stability and to improve mouthfeel while keeping the recipe gluten‑free and keto friendly.
Keto Custard
This vanilla custard is designed to be simple and adaptable. Below you’ll find the full ingredient list, step‑by‑step instructions, helpful tips for texture and flavour, and nutrition information so you can fit it into your meal plan. The recipe yields a rich custard that can be served warm or chilled.

Recipe Summary
- Recipe: Keto Custard (Vanilla)
- Serves: 4 servings
- Calories: 250 kcal per serving
- Prep time: 10 minutes
- Cook time: 30 minutes
- Total time: 40 minutes
- Author: FatForWeightLoss (Aaron Day)
Ingredients
- 1/2 cup almond milk
- 1 cup thickened cream (heavy cream)
- 1 tsp vanilla bean seeds (or 2 tsp vanilla extract)
- 4 egg yolks
- 1 teaspoon xanthan gum
- 1/3 cup erythritol (or preferred keto sweetener)
Instructions
- Combine the almond milk and thickened cream in a medium saucepan over medium heat.
- If using a vanilla bean, split it lengthways and scrape the seeds with the back of a knife. Add the seeds (or vanilla extract) to the milk and cream.
- Bring the mixture to a gentle simmer, stirring frequently for about 5 minutes until hot. Do not let it boil. Remove the pan from the heat.
- In a bowl, whisk the egg yolks with the xanthan gum and erythritol until smooth. Slowly pour the warm milk and cream into the egg mixture in a thin stream while whisking constantly to temper the yolks.
- Return the combined mixture to the saucepan and cook over low heat, stirring continuously, for 15–20 minutes. Cook until the custard thickly coats the back of a spoon—do not let it boil or the eggs may curdle.
- Remove from heat and strain the custard through a fine mesh sieve if you want an extra-smooth texture. Serve warm or chill in the fridge and serve cold.
Serving Suggestions
Serve a warm spoonful on its own for comfort food, or chill the custard and pair it with low‑carb berries, toasted nuts, or a sprinkle of cinnamon. It also makes an excellent filling for keto tarts or can be churned into a smooth custard‑style ice cream if you have an ice cream maker.
Tips for Perfect Texture
- Keep heat low once the eggs are tempered. Gentle cooking prevents curdling and keeps the custard smooth.
- Whisk constantly while reheating the tempered mixture to distribute heat evenly.
- Xanthan gum helps stabilize the custard and improves mouthfeel at small amounts; avoid adding too much or the texture will become gummy.
- Straining the finished custard removes any tiny cooked egg bits and yields a silky finish.
- If you prefer a thinner custard, reduce the cream slightly or increase the almond milk; for a thicker set, use slightly more cream or reduce the almond milk.
Storage
Store leftover custard covered in the refrigerator for up to 3 days. Reheat gently over low heat, stirring constantly, or serve cold straight from the fridge. If reheating, avoid boiling to keep the texture smooth.
Nutrition Facts
Amount per serving (approx. 125 g)
Calories: 250 (Calories from fat: 216)
Fat: 24 g — 37% DV
Carbohydrates: 5 g — 2% DV (Fiber 3 g — 13% DV)
Protein: 4 g — 8% DV
* Percent Daily Values are based on a 2000 calorie keto diet.
Variations and Substitutions
Swap erythritol for another zero‑calorie sweetener if preferred, keeping ratios similar and tasting as you go. For dairy‑free versions, use coconut cream in place of thickened cream, but expect a subtle coconut flavour. For more vanilla intensity, increase vanilla bean seeds slightly.
Notes
This recipe is intentionally simple and flexible. If you have questions about ingredient substitutions or would like tips for turning this custard into ice cream or a tart filling, note them when preparing and adjust steps accordingly. Enjoy this rich, low‑carb vanilla custard as a satisfying keto dessert for any season.