Brew the coffee. Make 1–2 shots of espresso or brew about 1/2 cup of strong coffee. Aim for bold flavor so it stands up to the milk and vanilla.
Warm the milk. In a small saucepan over medium heat, warm the milk until steam rises and small bubbles form around the edges. Do not boil.
If using a microwave, heat in 20–30 second bursts, stirring between each until hot.
Add vanilla and sweetener. Stir the vanilla extract into the hot milk. Add your chosen sweetener and a tiny pinch of salt. Taste and adjust.
You want a light sweetness with a clear vanilla note.
Froth the milk. Use a handheld frother, whisk vigorously, or shake the milk in a sealed jar for 15–20 seconds. You’re looking for fine, silky foam with small bubbles.
Combine with coffee. Pour the hot coffee into your mug. Gently add the steamed milk, holding back the foam with a spoon, then top with the foam.
Finish with nutmeg. Grate a pinch of nutmeg over the foam.
Start light; you can always add more. Freshly grated nutmeg is more aromatic than pre-ground.
Taste and tweak. If you need a touch more sweetness or vanilla, stir gently. Sip and enjoy while warm.
For iced latte: Fill a glass with ice, pour in the coffee, stir in cold milk mixed with vanilla and sweetener, then add a small pinch of nutmeg on top.