Place the chocolate protein powder and unsweetened cocoa powder in a small mixing bowl.

Whisk the dry ingredients together briefly to ensure there are no large cocoa lumps.

Add the non-fat plain Greek yogurt to the dry mixture.

Stir vigorously with a spoon or small spatula until the powders are fully incorporated and the mixture reaches a smooth, glossy consistency.

Adjust the texture if necessary by adding one teaspoon of water or skim milk at a time until the desired spreadable viscosity is achieved.

Serve immediately or store in an airtight container in the refrigerator for up to 4 days.