Perfect Granola Bars

Perfect Granola Bars
http://michellesnewrecipes.blogspot.com/

1/2 cup and 1/3 cup butter, softened (13 1/3 tbsp.)
1/2 cup honey (6 oz.)
1 tsp. vanilla
1/3 cup brown sugar (2.7 oz.)
4 1/2 cups oats (15 oz.)
1 cup whole wheat flour (4 1/2 oz.), or all-purpose flour
1/4 tsp. salt
1 tsp. baking soda
1 cup add-ins (i.e. chocolate chips, cranberries, etc.)

Mix all ingredients together in a large bowl (or stand mixer). Press into a greased 9x13 pan. Bake at 325º for 20 minutes. Cool on a wire rack; gently press down on bars after baking to flatten (I use a small, flat cutting board to press down on them). Cut into 24 bars (4 by 6). Store in an airtight container.