Prep the base: In a mixing bowl, whisk the Greek yogurt until smooth.
If it’s very thick, add 1 tablespoon of milk to loosen it slightly.
Add protein powder: Sprinkle in the protein powder and whisk until fully combined. Avoid dumping it all at once if it clumps; add gradually and whisk well.
Sweeten and flavor: Stir in your sweetener, vanilla extract, and a pinch of salt. Taste and adjust sweetness.
It should taste slightly sweeter than you want the final dessert, since flavors dull when frozen.
Fine-tune texture: If the mixture is stiff, add another splash of milk. For a softer scoop later, mix in vodka or vegetable glycerin. Both help prevent large ice crystals.
Chill the mixture: Cover and refrigerate for 30–60 minutes.
Starting cold improves texture whether you use an ice cream maker or not.
Option A — Ice cream maker: Pour the chilled mixture into your ice cream maker and churn according to the manufacturer’s instructions (usually 15–20 minutes) until thick and creamy. Fold in any mix-ins during the last minute.
Option B — No-churn: Transfer the mixture to a shallow, freezer-safe container. Freeze for 2–3 hours, stirring every 30 minutes to break up ice crystals.
Fold in mix-ins at the 90-minute mark.
Freeze to set: Once it reaches soft-serve consistency, you can enjoy it right away or freeze for another 1–2 hours for firmer scoops.
Serve: Let the container sit at room temperature for 5–10 minutes before scooping if it’s very firm. Use a warm scoop for cleaner balls.