Measure out 2 cups of chilled heavy cream and add it to the blender.
2 cups heavy cream
Add 1 tablespoon of vanilla extract and 2 tablespoons of low-carb sweetener to the blender.
1 tablespoon vanilla extract, 2 tablespoons low-carb sweetener
Secure the lid on the blender and blend on high for 30-45 seconds until the mixture is smooth and slightly frothy, with visible tiny bubbles.
Pour the blended mixture into a freezer-safe container, spreading evenly with a spatula.
Cover the container with a lid or plastic wrap and place it in the freezer. Every 30 minutes for the first 2 hours, remove and stir vigorously to break up ice crystals, ensuring a creamy texture.
After about 4 hours, the ice cream should be firm yet scoopable; serve immediately or store in the freezer for longer. The final ice cream will have a smooth, velvety texture with a glossy surface and visible vanilla flecks.