In a bowl, whisk together the flour, cinnamon, baking soda, and salt. Set aside until needed.
In another bowl, add the softened butter. Using a hand mixer, mix until fluffy. Add the bown sugar and mix on medium until light and fluffy.
Add the flour mixture gradually until a very soft dough forms.
Add the rest of the wet ingredients, which include the agave, vanilla extract, and milk. Mix on low until everything is combined. The dough shuld be sticky and soft.
Wrap in plastic wrap and put in the fridge for at least 1 hour.
Adjust the oven racks to the middle of the oven and preheat to 350°F.
To prepare for rolling, generously flour a work surface or parchement. This dough will still be sticky, so it's best to flour everything, including the rolling pin with a generous layer of flour.
Cut the dough into half and work with each piece individually.
Roll as even and thin as you can. It is going to expand in the oven, so go thinner than you would expect. Cut the edges with a pizza cutter. Then cut twelve crackers about 2 1/4 by 4 3/4 inch. To make it look like the grocery store version, dock the surface with holes with a toothpick, chopsticks, or with a fork.
If the dough is getting too soft, put in the refrigerator for 15-30 minutes to firm up.
Put in the oven and bake for 10-12 minutes. Immediately cut along the precut lines. Let cool.
These can be stored in an airtight container at room temperature for up to 3 weeks at room temperature or be put in the freezer for up to three months.