Heat a large pot over medium heat. Add the ground beef and diced onion, cooking for 8-10 minutes until browned and the onions are translucent. Drain excess grease.

Reduce heat to low and add the softened cream cheese. Stir until melted and combined with the beef, about 2-3 minutes.

Pour in the diced tomatoes, beef stock, and heavy cream. Sprinkle garlic powder and taco seasoning, then simmer for about 5 minutes.

Cover and lower the heat to a gentle simmer. Let it simmer for about 30 minutes, stirring occasionally.

Adjust seasoning with salt and pepper before serving, and garnish with keto-friendly toppings if desired.