Place your softened butter and both sugars into your mixer bowl. Beat them on medium speed until the mixture looks light and fluffy. This process takes about three full minutes of mixing.

Add your large eggs to the creamed butter one by one. Beat well after you drop each egg into the bowl. Pour in your rich vanilla extract and mix it until smooth.

Whisk your flour, baking soda, baking powder, and salt together. Dump this dry mixture into your wet ingredients slowly. Mix on low speed until the white flour disappears completely.

Pour your oats, chocolate chips, and peanut butter chips into the bowl. Add your colorful M&M candies and chopped pecans into the dough. Mix gently on low speed for just a few seconds.

Dump your crispy Rice Krispies cereal into the thick dough at the end. Use a rubber spatula to fold the cereal in by hand. Do not overmix or you will crush the cereal.

Scoop large balls of dough onto your prepared baking sheets safely. Leave about two inches of space between each large dough ball. They will spread out while they cook in the oven.

Bake your giant treats for twelve to fifteen minutes total. Remove them when the edges turn a beautiful golden brown color. Let them cool on the pan for five minutes.

Move the warm treats onto a wire cooling rack carefully. Allow them to cool completely before you serve them to guests. Enjoy your delicious homemade sweets with your family.