Prepare gelatin: Dissolve one lime/green gelatin packet in 1 cup boiling water. Let cool slightly before layering.Layer 1: Pour ½ of the hot lime mixture evenly into a 9x13 pan. Refrigerate 30 min until set. Reserve the remaining half on the counter. Layer 2: When the first layer is set (30 minutes), mix the reserved lime gelatin with ½ cup yogurt and pour over set layer. Refrigerate 30–40 min.DO NOT whisk in the yogurt until you are ready to pour the second layer of Jello.DO NOT POUR liquid Jello directly onto the set gelatin. This will drill a hole through the Jello. Use a large spoon to gently spoon the gelatin on, using the back of the spoon to spread it evenly across the previous layer like thin icing.
Layers 3 - 12
For remaining pairs of layers, follow all the mixing directions the same as for the first two layers. The layers from bottom to top are:Layers 1-2: Lime | Lime with yogurt ✔︎ Layers 3-4: Lemon | Lemon with yogurt Layers 5-6: Orange | Orange with yogurtLayers 7-8: Lemon | Lemon with yogurtLayers 9-10: Orange | Orange with yogurtLayers 11-12: Lime | Lime with yogurt
Add each layer as soon as the previous layer is set (30-40 minutes).
You will have a total of 12 layers when finished: 6 layers without yogurt and 6 with yogurt.
Refrigerate until ready to serve.
Notes
Tips for clean layers: Pour over the back of a spoon; gently tap the pan to release bubbles; use a kitchen torch to pop bubbles if needed.Serve: Slice directly from pan or cut into cubes. Optionally, add whipped topping for dessert presentation.Optional Bundt Cake Version:
Pour layers into a 10–12 cup bundt pan.
Chill at least 4 hours.
Unmold carefully using warm water bath on exterior edges.
Storage: Refrigerate up to 2 weeks; best within 1 week.