This recipe is very good, we served it at our church christmas party and they loved it! Recipe is courtesy of Cooks Country magazine.
12 Graham crackers, crushed to fine crumbs (about 1 1/2 cups)
3/4 cup sugar
5 tablespoons unsalted butter, melted and cooled slightly
3 (3-ounce) boxes Jell-O
4 1/2 cups boiling water
3/4 cup pineapple juice
1 envelope unflavored gelatin
2 cups heavy cream
1 teaspoon vanilla extract
1/8 teaspoon salt
For the crust: Adjust oven rack to middle position and heat oven to 325 degrees. Stir cracker crumbs, 1/4 cup sugar, and butter in bowl until crumbs resemble wet sand. Press into bottom of 9-inch springform pan and bake until edges are golden brown, 12 to 15 minutes. Cool on wire rack.
For the filling: In 3 seperate large bowls, whisk each box of Jell-O with 1 1/2 cups boiling water until dissolved. Pour into 3 loaf pans or pie plates and refrigerate until set, about 4 hours. Once Jell-O has solidified, cut into 1/2 inch cubes and keep chilled. Combine 1/4 cup pineapple juice and unflavored gelatin in bowl. Microwave, stirring occasionally, until gelatin is dissolved, 1 to 3 minutes. Slowly whisk in remaning pineapple juice. With electric sand mixer set on medium-high speed, whip cream, vanilla,salt, and remaining sugar until stiff peaks form, about 3 minutes. Reduce speed to low and slowly add juice mixture until combined. Gently fold Jell-O cubes into cream mixture. Scrape into prepared pan and referigate until set, at least 4 hours or up to 2 days.