📖 Instructions

1. First, prepare the zabaglione: In a heatproof bowl (stainless steel or glass), whisk together the egg yolks and sugar until the mixture becomes pale and thick. This usually takes about 2-3 minutes. You're looking for a ribbon-like consistency when you lift the whisk.
2. Next, gradually whisk in the Marsala wine. Make sure it's fully incorporated before moving on. It's important to add the wine slowly to prevent the eggs from cooking too quickly.
3. Place the bowl over a saucepan of simmering water, ensuring that the bottom of the bowl doesn't touch the water. This is a double boiler, also known as a bain-marie. Continue whisking constantly for about 5-7 minutes, or until the zabaglione becomes light, frothy, and has nearly tripled in volume. It should be thick enough to coat the back of a spoon.
4. Remove the zabaglione from the heat and continue whisking for another minute or two to cool it down slightly. This prevents it from collapsing. Set aside to cool completely. You can chill it in the refrigerator for later use if you like, but make sure to cover it with plastic wrap to prevent a skin from forming.
5. Now, let's move on to the zest! Zest the citrus fruits, being careful to avoid the white pith, which can be bitter. A microplane or fine grater works best for this.
6. In a blender, combine the chilled vanilla ice cream, cooled zabaglione, milk (or non-dairy alternative), and citrus zest. Blend until smooth and creamy. If you prefer a thinner milkshake, add a splash more milk. For a thicker shake, add a few more scoops of ice cream.
7. Taste and adjust the sweetness or citrus level as needed. If it's not sweet enough, add a drizzle of honey or maple syrup. If it needs more zing, add a pinch more zest.
8. Pour the milkshake into a chilled glass or glasses. I like to use mason jars for a rustic touch, but any glass will do.
9. Garnish with a dollop of whipped cream (optional), a sprinkle of citrus zest, and a Pirouline cookie or a thin slice of citrus fruit on the rim of the glass.
10. Serve immediately and enjoy every single sip! You deserve it. Plus I think you will feel amazing after drinking this.