Let the block of cream cheese come to room temperature.
Throw (literally) the cream cheese, condensed milk and extract in a mixing bowl and blend until smooth.
Get your wide mouth shot glasses and put one Nilla Wafer (round side down) on the bottom of each glass. If your shot glasses are a little too narrow for the wafers, just use some kitchen scissors to trim them. They don't have to be pretty, they will be covered in cream cheese.