Preheat oven to 350 degrees and line two baking sheets with parchment paper.
In a small saucepan over medium heat, melt 4 tablespoon of butter. When it’s melted, pour in oats and stir for about 5-7 minutes, until browned and toasted. Pour oats into an even layer on the parchment paper. Set aside to cool.
In a medium bowl, whisk together flour, baking soda, baking powder, and salt. Set aside.
In the bowl of a mixer with paddle attachment or in a large bowl with a hand mixer, combine remaining 1 cup (2 sticks) of butter, brown sugar, and granulated sugar. Beat until mixture is light and fluffy, 3-4 minutes.
Mix in eggs one at a time. Add sunflower seed butter and vanilla and continue mixing until well-combined.
Add flour mixture to beat and mix until just combined, taking care not to over-mix.
Fold oats into the batter.
Scoop about 3 tablespoon cookie dough (I use a #20 cookie scoop) onto prepared cookie sheets, about an inch apart. Top cookie dough with sprinkles, if desired.
Bake for 12-14 minutes, until cookies are just turning golden around edges. Let cool in pan for a couple minutes before moving to wire racks to cool completely.