01 - Dissolve the strawberry gelatin in 1 cup boiling water in a large mixing bowl. Stir in 1/2 cup cold water to cool slightly.
02 - Add sliced strawberries, crushed pineapple, and mini marshmallows to the gelatin. Mix gently to combine. Pour into a 9x13-inch dish and refrigerate until fully set, about 2 hours.
03 - In a medium bowl, beat softened cream cheese and granulated sugar with an electric mixer until smooth and creamy. Gently fold in the whipped topping until evenly incorporated. Spread the mixture evenly over the chilled, set strawberry layer.
04 - Melt butter in a skillet over medium heat. Add brown sugar, stirring until dissolved. Add rice cereal and chopped pecans. Cook, stirring constantly, until lightly caramelized and golden, about 4-5 minutes. Transfer to a baking sheet, spread out in an even layer, and let cool completely.
05 - Just before serving, sprinkle the cooled crackle topping evenly over the creamy layer. Serve immediately for the best crunch texture.