Sift the powdered sugar into a small bowl to remove any lumps—this ensures your frosting will be completely smooth without any grittiness. Place your mixing bowl in the freezer for 5 minutes before starting; a cold bowl helps the heavy cream whip to stable peaks much more quickly and reliably. Have all ingredients measured and ready before you begin beating.

Pour the cold heavy cream into your chilled bowl and beat on medium-high speed for about 2-3 minutes, watching carefully until soft peaks form—the cream should look fluffy and hold its shape briefly when you lift the beaters, but the peaks should gently fold back on themselves. This is the critical moment before you add the sugar, as you need the cream to be whipped but not overbeaten yet.

Add the sifted powdered sugar and vanilla extract to the soft-peaked cream, then beat on high speed for another 1-2 minutes until stiff peaks form and the mixture looks glossy. I always watch the beaters closely at this stage—you want the peaks to stand straight up without drooping, which tells you the cream is whipped to its full potential without becoming grainy from overbeating.

Before the whipped cream reaches ultra-stiff peaks, sprinkle the banana pudding mix over the surface and reduce the mixer to low speed, mixing for just 15-20 seconds until the pudding powder is barely incorporated and the texture is still light and fluffy. Stop mixing immediately—you want to fold this in gently rather than fully beat it, as overworking will deflate your peaks and make the frosting dense instead of airy. Using low speed followed by a light hand-fold with a spatula, gently scrape the bottom and sides of the bowl and fold the mixture together just until the pudding color is evenly distributed throughout.