To make heavy cream at home, you can use a simple 2-ingredient method involving unsalted butter and whole milk. Here's a straightforward recipe based on reliable sources:

Ingredients:

• Unsalted butter (about 1/3 cup or 150g)
• Whole milk (about 1/3 cup or 150g)

Instructions:

1. Melt the unsalted butter in a saucepan over medium heat. Do not let it boil—just melt it completely.
2. Add the whole milk to the melted butter and stir for about 20 seconds, then remove from heat.
3. Pour the mixture into a blender and blend on high speed for 1-2 minutes until fully combined.
4. Let the mixture cool to room temperature, then refrigerate it for at least a few hours to thicken—it will resemble heavy cream.
5. Use this homemade heavy cream in recipes where you need liquid heavy cream for richness, such as sauces, soups, or creamy drinks.

Notes:

• This homemade heavy cream substitute generally does not whip well like store-bought heavy cream.
• Use unsalted butter to avoid affecting the flavor.
• Store leftover heavy cream in an airtight container in the fridge for up to 3-5 days.
• If the mixture separates after refrigeration, shake or blend it again before use.

This method provides a good approximation of heavy cream using common kitchen staples.