Place an oven rack in the middle position of the oven. Heat the oven to 350℉. Grease or line a 12-cup muffin tin.
Put the ground flaxseeds into a large bowl. Pour the water and milk over the flaxseeds and mix together. Set aside and let sit for 5 minutes.
½ cup ground flaxseeds, ½ cup water, ½ cup almond milk
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
1 ½ cups whole wheat flour, 2 tsp baking powder, ½ tsp baking soda, ½ tsp kosher salt
To the flaxseed mixture, add the coconut oil, coconut sugar, apple cider vinegar, and vanilla. Whisk together well.
⅓ cup melted coconut oil, ¼ cup coconut sugar, 1 TBS apple cider vinegar, 2 tsp vanilla
Pour the dry ingredients in with the wet ingredients. Using a rubber spatula, gently mix together until no dry flour remains.
Fold in the chocolate chips until evenly distributed throughout the batter.
1 cup chocolate chips
Evenly divide the batter among the muffin tin. Bake for 22 - 25 minutes.
Let cool in the pan for 10 minutes, then remove the muffins from the pan and finish cooling on a wire rack. Enjoy warm or at room temperature.