01 -
Preheat the oven to 350°F.
02 -
In a medium bowl, whisk the oats, flour, baking powder, baking soda, and salt.
03 -
In a large bowl or stand mixer, beat the butter, brown sugar, and sugar until combined. Add the egg, egg yolk, and vanilla extract. Mix until smooth.
04 -
Add the dry ingredients to the wet ingredients and mix to form a thick dough. Gently fold in the chocolate chips and Cadbury eggs.
05 -
Scoop the dough into balls and place them on a parchment or silicone-lined baking sheet. Bake for 12-14 minutes, until light golden brown on the bottom.
06 -
Remove from the oven and let cookies cool on the baking sheet for 5-10 minutes before transferring to a wire rack.