I just wanted to show you this video about a player from the PGA Tour, showing what you should not do:
As you can see, he tried to putt the ball into the hole holding the putter with only one hand, but he almost didn’t strike the ball. Nonetheless the stroke counts, since he had an intention (see the Definition of a “Stroke”).
Therefore he made three strokes during the video.
Thus: Be careful when putting these short putts!