https://www.dietdoctor.com/recipes/keto-hot-chocolate
1 tbsp=15 ml
1 tsp=5 ml
1 oz=28 g
1 cup = 16 tbsp = 48 tsp = 240 ml
食谱是1份的用量（可以按比例自行增减）：
Nutrition（每份）：
95% Fat
2% Protein
1% Carbs
1 g carbs / serving
( one cup )
| 无盐黄油 butter preferably unsalted | 30 g |
| 无糖可可粉 cocoa powder | 1 tablespoon |
| 香草精 vanilla extract | ¼ teaspoon |
| 开水 boiling water | 250 ml |
所有材料放入搅拌机（如果用手持搅拌机搅拌，就把所有材料放入一个大一点的容器）。Put the ingredients in a tall beaker to use with a hand blender.
搅拌15-20秒，出现细腻的泡末即可。Mix for 15–20 seconds or until there’s a fine foam on top.
