01 -
Set your oven to 350°F. Grab a 9×13-inch pan, line it with parchment, and spray it lightly with nonstick spray. Put it aside.
02 -
Use a stand mixer with a paddle attachment. Blend softened butter, brown sugar, and white sugar on medium for about 2 minutes. Toss in the eggs, vanilla, salt, cinnamon, baking soda, and baking powder. Keep mixing until it’s smooth, scraping the sides here and there.
03 -
Switch the mixer to low speed and slowly add the flour and oats. Mix just enough to bring everything together.
04 -
With a spatula, fold in the chocolate chips, raisins, and walnuts until they’re spread out evenly.
05 -
Press the dough into the lined pan and bake for roughly 20-25 minutes. The edges should look golden and firm.
06 -
Let the bars cool all the way before cutting them so they don’t fall apart.