Preheat oven to 350°F. Line a baking sheet with parchment paper.
To make browned butter, place stick of butter in a small skillet and cook it over medium heat until it browns. Take it off the heat and set aside to let cool.
In a medium-sized bowl, whisk together Splenda Sweetener, flour, baking powder, and salt.
In another bowl, whisk egg and extracts. Slowly add cooled browned butter, whisking continuously. Make sure to scrape out all of the browned butter bits at the bottom of the skillet.
Add the wet ingredients into the dry and stir until fully combined. If dough is a little wet, place it in refrigerator for 10 minutes to harden.
Scoop dough into 12 balls, about 2 tablespoons each, and place 3 inches apart on prepared baking sheet. Press each dough ball down into a disk. Dip toy dinosaur’s foot in some flour and then carefully press the foot into each dough disk, creating a fossil footprint.
In a small bowl, mix together cocoa powder and water. Dip a small paintbrush into the chocolate mixture, and then gently paint each footprint. (Add a little more water if needed to thin out the chocolate.)
Bake cookies for 8 – 10 minutes. Remove, let cool, and enjoy!