Preheat oven to 350°F. Line a baking sheet with parchment.
In a bowl using an electric mixer, beat peanut butter and vegetable oil spread until creamy.
Add egg substitute, water, and vanilla extract; beat on high speed for 2 minutes. Add Splenda Sweetener and mix until well blended.
Add flour, baking soda, and salt; mix on low speed until well blended. Mixture may be crumbly.
Scoop tablespoons of dough and shape into balls. Place on prepared pan about 2” apart. Flatten each ball with a fork, pressing a crisscross pattern into each cookie.
Bake for 7–9 minutes or until light brown around the edges. Cool slightly, then transfer to a wire rack to cool completely.