4 tablespoons unsalted butter, cut into small pieces at room temperature
Instructions
Zest 4 mandarin oranges. Cut each mandarin in half and juice into a measuring cup until you have ½ cup of mandarin juice. I only needed to juice 4 mandarins, but you may need more depending on the size.
Over medium heat, begin simmering water in a saucepan that is sized to support a stainless steel bowl (should rest right above the water level)
In that stainless steel bowl, whisk together the eggs, sugar, and mandarin juice with a wire whisk, until combined and smooth. When the water is gently simmering, place the stainless steel bowl over the saucepan. Whisk constantly until mixture has thickened, anywhere from 5-10 minutes. When thickened, remove from heat and immediately whisk in butter until they have melted completely and are incorporated with the mixture.
Pour mixture into container for storage. Allow to cool completely and then refrigerate overnight.
Recipe by the modern barista at https://themodernbarista.com/index.php/2016/07/09/colombia-cafe-mujeres/