Haven't tried it, but the lowest speed on my blender is way too fast. I think it would be very difficult to slow it down enough to not froth the starter.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk