Preheat the oven to 375 degrees F.
In a food processor or blender, grind cereal to a breadcrumb-like consistency. Transfer crumbs to a large bowl.
To the bowl, add oats, flour, sweetener, brown sugar, baking powder, cinnamon, salt, and powdered creamer. Mix well and set aside.
In a medium bowl, dissolve powdered creamer in 2 tablespoons hot water. Add all other wet ingredients (pureed peaches, pumpkin, and egg substitute) and stir until mixed well.
Add liquid mixture to dry ingredients and stir until completely blended. Chop raisins and cranberries and stir into the batter, evenly distributing and making sure they don't all stick together.
Spray a large baking sheet with nonstick spray and spoon batter into 4 evenly spaced circles with a 2-ounce ice cream scoop, if using. Spread batter out a bit with the back of a spoon.
Bake in the oven until tops of treats are just slightly crispy, 12 to 14 minutes. Allow to cool slightly on the sheet. Grab 'n go!
PER SERVING (1 cookie): 154 calories, 1.5g fat, 166mg sodium, 32.5g carbs, 5g fiber, 10.5g sugars, 5g protein