Preheat oven to 300 degrees F (150 degrees C). Place ramekins into a baking dish and pour water 1/2 way up ramekins.

Place ingredients into a blender and combine until smooth. Pour into ramekins. Bake in preheated oven for 30 minutes. Remove from oven and cool to room temperature. Refrigerate for 1 hour, or overnight.

Preheat oven to broil (or using a brulee torch). Sift the remaining sweetener evenly over custard. Place dish under broiler until sweetener melts, about 2 minutes. Watch carefully so as not to burn. Remove from heat and allow to cool. Refrigerate until custard is set again.