01 -
Preheat oven to 350°F (175°C). Line an 8x8-inch baking pan with aluminum foil and spray with cooking spray; set aside.
02 -
Add unsalted butter to a large, microwave-safe bowl and heat until melted, about 1 minute on high power.
03 -
Wait momentarily before adding the egg. Add the egg, light brown sugar, vanilla extract, and whisk until smooth.
04 -
Add the all-purpose flour, salt, and stir until just combined. Avoid overmixing.
05 -
Add ¾ cup M&M's Milk Chocolate Eggs to the batter and stir to incorporate, pressing gently as needed.
06 -
Turn the batter into the prepared baking pan, smoothing the top lightly with a spatula. Evenly distribute the remaining ¼ cup of M&M's Milk Chocolate Eggs over the top and press them down lightly.
07 -
Bake for about 20 minutes, or until the top is set in the center. A toothpick inserted into the center should come out clean or with a few moist crumbs, but no batter.
08 -
Cool the blondies for about 30 minutes before slicing and serving.