Preheat the oven to 350°F. Line two baking sheets with parchment paper.
To make the dough: In the bowl of a stand mixer fitted with the paddle attachment, add the butter, honey, eggs, all purpose flour, and oat flour. Mix on low until combined.
Lightly flour your work surface. Roll out the cookie dough to ¼-inch thick, adding more flour if needed.
Use holiday cookie cutters such as Christmas trees, candy canes, snowflakes, or gingerbread men and cut out cookies. Place them on the prepared baking sheet.
To make the topping: In a small dish, add the honey and water. Microwave for 15 seconds or until the honey is melted. Using a pastry brush, brush the honey water topping on top of all the cookies.
Bake for 17 to 20 minutes or until golden brown around the edges and bottom.
Store at room temperature for up to 2 weeks. Store in an airtight container in the freezer for up to 2 months.