Preheat oven to 350 degrees.
Beat butter and sugar in large bowl with electric mixer on medium speed until smooth. Add honey, eggs, and vanilla; mix well.
Add baking soda, salt, rolled oats, flour, and Post Grape-Nuts. Combine until just mixed.
Drop rounded tablespoonfuls of dough, 2 inches apart onto lined or greased cookie sheets. Bake for 10-14 minutes or until golden brown.
Cool 2-3 minutes; remove from baking sheets. Cool completely on wire racks. Enjoy.
Once cooled, store these cookies in an airtight container at room temperature.