Preheat the oven to 350°F. Line a baking sheet with parchment paper.
To make the dough: In the bowl of a stand mixer fitted with the paddle attachment, add the butter, cane sugar, and vanilla extract.
Cream the butter and sugar together until smooth and no bits of butter remain.
Add the eggs, flour, baking powder, and salt in that order and mix on low until a cookie dough forms and no streaks of flour remain.
Using your hands form a large log out of the cookie dough and flatten slightly so it’s about 1-inch thick, it should be about 13 x 3 inches.
To make the topping: In a small bowl, mix together the cane sugar and cinnamon and spread over the top of the dough log.
Bake for 35 minutes or until the middle looks set, but not completely done.
Remove from oven and let rest for 15 minutes.
Trim off the edges, then slice into 12 pieces which are about 1/2 to 3/4 inch slices, separate them, and bake again for 20 minutes or until golden brown and crispy.
Store in a cool, dry place for up to 7 days.