Soften the Base: In a large mixing bowl, combine softened cream cheese and butter. Use a hand mixer on medium speed until smooth and creamy.
Add Sweetness: Gradually add powdered sugar, 1/2 cup at a time, mixing on low to prevent dusting. Continue until fully incorporated.
Flavor Boost: Add vanilla extract and optional heavy cream. Beat on medium-high speed for 2–3 minutes until light and fluffy.
Rest & Pipe: Let the icing rest for 5 minutes at room temperature. Transfer to a piping bag for easy decoration or spread directly on cooled bundt cakes.