Can this be made in under 30 minutes?

Yes, the recipe is designed to be quick and efficient.

Does it work for meal prep?

Most versions store well for one to three days.

Yes, simple swaps can be made for convenience or dietary needs.

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Preheat the oven to 300°F (150°C) and line a muffin tin with paper liners. Bring cream cheese and butter to room temperature.
Beat cream cheese, sugar, and butter until glossy and smooth. Add egg yolks one at a time, and then stir in milk until silky.
Sift together flour, cocoa powder, and salt, then fold into the cream cheese mixture.
Whip egg whites to soft peaks in a separate bowl and fold into the batter in three parts.
If using, fold in mashed bananas or applesauce.
Fill muffin liners three-quarters full, sprinkle with nuts if desired.
Place the muffin tin in a roasting pan filled with an inch of hot water.
Bake for 35 to 45 minutes until lightly golden. Allow to cool in the water bath before removing. Dust with cocoa or serve plain.

Room temperature ingredients save time and reduce lumps. Use a hand mixer for the egg whites and a sturdy spatula to fold to maintain volume.