Beat butter, brown sugar and granulated sugar together until fluffy. About 3 minutes. Beat in eggs one at a time. Scraping down the sides of the bowl after each egg. Beat in vanilla extract.
1/2 cup butter, 3/4 cup light brown sugar, 3/4 cup granulated sugar, 2 eggs, 1 teaspoon vanilla extract
In another bowl combine flour, malted milk powder, baking soda and salt. Slowly beat flour mixture into egg mixture. Mix well.
2 1/4 cups all purpose flour, 1/2 cup malted milk powder, 1 teaspoon baking soda, 1/4 teaspoon salt
Fold in chopped malted robin egg candies and dark chocolate chunks.
1 cup rough chopped malted robin egg candies, 1 cup dark chocolate chunks
Press cookie batter into a a 10 inch cast iron skillet. Bake in preheated oven for 25 - 35 minutes or until a toothpick inserted comes out clean. Allow to cool and serve.
Notes
This is great with some vanilla ice cream scooped on top! If you don't have Malted Robin's Eggs you can also use Whopper candies instead. Nutrition information for estimation purposes only.