For older ovens, if your lowest temp is 200 degrees, prop door open very slightly (less than 1 inch) and dry at least over night. Food dehydrators work great, too, as well as a wonderful sunny day as long as you cover your crackers to keep bugs and dust away.
Rosemary/Walnut – to basic recipe add 2 rounded tablespoons of ground rosemary, 1 tbsp. dried rosemary leaves, and ¼ tsp. of walnut oil.
Sesame/Poppy Seed – add 2 Tbsp. each of Sesame and Poppy Seeds
Cinnamon – add 4 Tbsp. ground cinnamon, ½ tsp. cinnamon oil, and ¾ cup sucanat or rapadura.
Cracked Pepper – add 2 Tbsp. of cracked black, green, or pink peppercorns.
Herbed – add 1 ½ Tbsp. dried dill, 1 tsp. each basil, thyme, oregano, and tarragon.