Cookie Dough: To a high-speed blender, add sunflower seeds and pumpkin seeds and pulse until just barely ground.
In a large mixing bowl, using an electric mixer, mix together butter, powdered sweetener, and vanilla extract. Stir in ground seed mixture, shredded coconut, coconut flour, SunButter, and salt. Ensure butter is well-mixed with all ingredients (see note below).
Line a baking sheet with parchment paper.
Using a spoon, spoon out approximately 1 heaping tablespoon of dough and roll into 12 balls. Transfer rolled dough to prepared baking sheet and transfer baking sheet to refrigerator to chill for 30 minutes.
Preheat oven to 375 degrees.
After dough has chilled, transfer baking sheet from refrigerator to oven and bake cookies until golden, about 10-12 minutes.
Powdered Sweetener Dusting: Remove cookies from oven and allow to sit at room temperature for about 5 minutes. Then, while still warm, carefully roll individual cookies in 1 tbsp (7g) of powdered sweetener. Transfer sweetener-coated cookies to plate and set aside to cool at room temperature. After cookies have fully cooled, dust individual cookies with remaining 2 tsp (5g) of powdered sweetener.