In a medium mixing bowl, add oats to the melted butter. Stir to combine, and let soak for 1 hour.
After 1 hour, Preheat oven to 375 degrees Fahrenheit.
To the butter and oats mixture, add the sugar and stir to combine. Sift the flour and baking powder together, and add to the ingredients.
Add eggs. Stir all ingredients together with a spoon.
Make approximately 1" balls of cookie dough and place them on the baking sheet lined with parchment paper or a silicone baking mat, allowing for several inches of space between the cookie dough balls. Flatten the dough balls with a fork.
Bake for 8-12 minutes until the edges of the cookies are golden brown. Allow the cookies to cool for a few minutes on the baking sheet (until they hold their shape) before transferring to a cooling rack.
To store, place the cookies in stacks in a food storage container or tin.
Enjoy!