Sift together the sugar, cocoa, flour and salt. Drizzle in the melted butter while still hot, add the vanilla and stir until combined. Use a small cookie scoop to scoop out 20 portions and use your hands to roll them into neat balls. Press a lollipop stick into each ball. Place on the prepared baking sheet and let cool at room temperature for 30 minutes.
Melt the chocolate wafers in a microwave or double boiler and let cool slightly. Dip each pop into the chocolate. Lightly tap the stick on the side of the bowl so the chocolate sheets around the sides and drips off. Sprinkle over the chocolate jimmies. Place the sticks in the florist foam and allow the pops to set at room temperature.