Preheat the oven to 350°F. Grease two cookie sheets.
Brownie Cookies
In a large bowl, whisk together flour, cocoa, baking powder, and salt. Set aside.
In a medium bowl, mix sugar, butter, honey, vanilla, and egg whites until combined. Add to the flour mixture. With your hands, mix dough just until blended.
With your lightly greased hands, roll dough into approximately 1 inch balls and place on greased cookie sheets. Flatten each brownie cookie slightly with the back of a spoon.
Bake just until brownies are slightly cracked, approximately 7-9 minutes. Cool on the cooling rack.
Buttercream Frosting
In a medium mixing bowl, cream butter, milk and vanilla together. Gradually add powdered sugar and beat until smooth and creamy.
Once cookies have cooled completely, frost cookies with a generous amount of frosting, then sprinkle with jimmies sprinkles.
Let the frosting setup then place cookies in a container for storing and place parchment paper in between the layers.
Notes
Nutritional values are approximate.
Please note that these values can change with different brands and any modifications made to the recipe. For the most accurate information, use a nutritional calculator with the exact brands and measurements.