Heat butter in a sauce pan over medium heat until melted. Add the marshmallows and stir until completely melted. Stir in jello powder. Remove from heat and stir in Rice Krispies. Let cool 5 minutes and mix in 1/2 cup chocolate chips.
Make sure your hands are clean and greased well to avoid sticking. Gently press your treats into a rimmed baking sheet.
While treats cool, melt remaining chocolate chips with shortening for 1 minute. Stir until smooth and melted. Heat in 15 second bursts if needed for a creamy consistency. Drizzle over cooled strawberry krispies treats