In the bowl of a mixer, add brown sugar, flour, baking soda, cocoa, and salt. Mix on low to incorporate.
Add in the butter cubes, slowly increasing speed to fully incorporate the butter and reach a coarse consistency.
Measure out 1/3 cup honey in a 1-2 cup measuring cup. Add the buttermilk, food coloring, and vanilla to the honey and mix together.
Add the honey mixture to the flour mixture and combine on medium speed until the dough comes together.
Pour dough onto a well-floured surface and roll out. Try to make dough 1/8 to 1/4 inch thick, being as consistent as you can. You can use a square cookie cutter or cut out rectangles, whatever you prefer.
I used the top of a #3 tip to make little holes in the top of some cookies.
Place on a parchment-lined baking sheet and bake at 350°F for 6-8 minutes. (Keep an eye on them! I burned my first batch at seven minutes.)