In a large mixing bowl, beat Crisco, milk, and brown sugar until combined. Add egg and beat until fully incorporated. Slowly beat in malted milk powder, flour, salt, and baking soda.
Press cookie dough into a large baking sheet with one inch sides (about 15.5 x 10 inches). Bake for 18-20 minutes until browned. Remove from oven.
Meanwhile, in a large saucepan over low heat, warm sweetened condensed milk. Add milk chocolate morsels and stir until smooth. Remove from heat and whisk in Ovaltine powder. Pour mixture evenly over baked crust.
Place Whoppers candies in a large resealable plastic bag. Lay bag on a cutting board and gently hit 2-3 times with a pan to crush slightly, leaving some pieces whole. Press Whoppers candies evenly over fudge layer.
Refrigerate bars for at least 2 hours or overnight to set. Cut into squares and enjoy!
Notes
For best results, let the bars chill overnight before cutting to ensure the fudge layer is fully set.