1-First Step: Prepare Ingredients and Tools
Gather all gelatin boxes, milk, sugar, sour cream or yogurt, and unflavored gelatin. Lightly butter or spray the 9 x 13 inch pan or individual serving cups to prevent sticking. Rinse berries or fruits if adding for additional flavor.

2-Second Step: Make the Creamy White Layer
Bring 2 cups milk to a gentle boil and dissolve 1 cup sugar. In a small bowl, mix ½ cup cold water with 2 envelopes of unflavored gelatin until fully combined. Pour this gelatin mixture into the warm milk and stir well. Add 1 pint sour cream or vanilla yogurt along with 2 teaspoons vanilla extract, mix thoroughly. Cover and allow to cool to room temperature while preparing gelatin layers.

3-Third Step: Prepare Colored Gelatin Layers
For each flavored gelatin box, dissolve the contents in 1 cup boiling water, stir until dissolved, then stir in ½ cup cold water. Pour the first colorful layer into the prepared dish or cups. Refrigerate until the layer is mostly set but still slightly tacky (approximately 20–30 minutes).

4-Fourth Step: Add White Cream Layer and Repeat
Once the colored layer is tacky, pour around 1½ cups of the prepared white creamy mixture evenly over it. Return to the fridge until set. Repeat the process alternating colored gelatin layers with creamy white layers, typically forming about 7 layers total (4 colored and 3 white), ensuring each layer sets to prevent blending. Pour carefully using the back of a spoon to protect layers below.

5-Final Step: Chill and Serve
After assembling all layers, refrigerate the dessert for several hours or overnight to allow complete setting and flavor melding. Before serving, garnish with fresh mint or whipped cream if desired. Use a knife warmed under hot water and dried before slicing to maintain neat layer edges.