Place the butter into a saucepan on the stove over medium heat. When the butter has melted, whisk in the Swerve brown sugar substitute until completely dissolved. Stir in the heavy whipping cream until well combined. Cook, stirring frequently for 10 minutes until it begins to froth up and thicken. Remove the mixture from the heat and stir in the pecan halves and coconut flakes. Stir well to combine, and let sit to cool slightly for a few minutes. Use a large spoon to drop spoonfuls of the cookie mixture onto parchment paper. Do not worry if some of the extra liquid leaks out from the mound of cookie batter. This should make 11 cookies. Sprinkle some keto friendly chocolate chips on top of each cookie, and lightly press them down. Place the cookies into the fridge for 30 minutes to an hour to harden. Serve immediately or store in an airtight container in the fridge.