In a small saucepan, add the milk, heavy cream, and mashed ripe banana. Whisk together until evenly combined. Include the brown sugar, cinnamon, nutmeg, and vanilla extract and blend them into the mixture.

Place the saucepan over medium-low heat, continuously whisking. Warm for about 3-5 minutes until it becomes warm and slightly thickened without boiling.

Taste your Banana Bread Coffee Creamer and adjust sweetness if necessary by adding more brown sugar or cinnamon. Heat for another minute until fully integrated.

Pour the mixture through a fine mesh strainer into a clean jar to ensure a luxurious texture. Press gently to extract goodness while leaving solids behind.

Let the creamer cool slightly before covering it with a lid. Once cool, store in the refrigerator for up to 5 days. Shake well before use.