Just briskly whisking the soy milk and honey together in the saucepan creates surface foam. If you don't have an electric milk frother, you can make this drink the old-fashioned way. The foam won't be as thick and airy but this method still produces enough for a cafe-feeling type latte. Just whisk briskly off and on while you are preparing the drink. When you turn the heat up to medium, whisk vigorously and continually until the soy milk starts to boil. Take off the heat and slowly pour into your cup. You could also try using an electric hand held mixture with the whisk attachment on. This would put more air into the milk, whipping it.