<p>Preheat oven to 350 degrees.<br />
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1. Cream together butter, vanilla, and powdered sugar in a large bowl.<br />
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2. In a separate bowl, combine flour, baking soda, oats and hazelnuts; stir into creamed mixture. (Mixture may be slightly dry - do not add liquid.) Mix in chocolate chips; stir to combine.<br />
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3. Drop rounded tablespoons of dough, 2 inches apart, onto ungreased cookie sheet.<br />
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4.&nbsp; Bake 8-10 minutes, or until golden brown.<br />
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5. Cool cookies on baking sheet; carefully remove and store in an airtight container.</p>