I start by adding the vanilla ice cream to my blender. This creates that thick, creamy base that makes the milkshake taste just like Zaxby’s.

Next, I pour in the whole milk, birthday cake flavor extract, and vanilla extract. You’ll notice the aroma instantly smells like cake batter.

Blend everything on medium speed until smooth and creamy. If you like a thicker milkshake, you can add more ice cream. For a thinner consistency, add a splash of milk.

I gently stir in the rainbow sprinkles at the end so they don’t fully dissolve and give that fun birthday cake texture.

Pour the milkshake into tall glasses, top with whipped cream, and finish with extra sprinkles or white chocolate chips if you like.