Indulge in these chewy, oat-based blondies with customizable mix-ins for a delightful treat. Perfect for satisfying your sweet tooth anytime.
Preheat the oven to 350°F (175°C). Grease and flour a 9x13-inch baking pan.
In a large bowl, beat together the butter, brown sugar, and white sugar until creamy. Add eggs one at a time, mixing well after each addition. Stir in vanilla extract, followed by rolled oats, flour, chocolate chips, raisins, walnuts, baking soda, baking powder, and salt. Mix until all ingredients are moistened; then spread into the prepared baking pan.
Bake for 20 to 25 minutes or until golden brown. Let cool in the pan for about 5 minutes before cutting into bars.
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