Preheat the oven to 450 degrees Fahrenheit. Cover two large baking sheets with parchment paper.
In a large mixing bowl, combine the flours, salt and rosemary (if using.) Add the oil and milk.
Divide the dough in half so it’s easier to work with. Take the first half of the dough and roll it out to about 1/8-inch thickness on a floured surface or another sheet of parchment paper.
Using a 2-inch round culinary ring or cookie cutter, cut out the crackers. Gather and re-roll dough as needed until you have cut as many circles as you can.
Brush crackers lightly with water using a pastry brush and add toppings (sea salt or Everything Bagel Seasoning.) Place crackers on prepared baking sheet (they don’t have to be too far apart, they won’t spread too much) and bake in 450-degree oven for 10-12 minutes, or until crackers are just golden.
Remove from oven and transfer to a wire rack to cool. Let cool completely before transferring to a resealable container or plastic bag for storage. For best results, enjoy within a couple of days.