Step 1

To make on the stove: In a small pot, heat vanilla shake over medium-low, stirring occasionally, until warm but not boiling, about 1 to 2 minutes. Reduce the heat to low and stir in the white chocolate chips. Stir constantly until the chocolate is fully melted and smooth, 30 to 60 seconds more.

Step 2

To make this in the microwave, pour shake in a large microwave safe mug with the white chocolate chips and microwave 1 ½ minutes, stirring well halfway, until heated through and the chocolate is melted and smooth. Top with whipped cream, if using and sprinkle with nutmeg.

Step 3

Pour into a large mug and top with whipped cream, if using and sprinkle with nutmeg.