In a medium bowl, combine the milk and the vinegar, and let stand for at least 5 minutes to “sour”
In a separate bowl, combine flour, graham cracker crumbs, baking powder, and salt in a large mixing bowl. Whisk egg and butter into
the “soured” milk. Mix in the sugar until fully combined. Pour the flour mixture into the wet ingredients, and whisk it together until the batter is smooth. Fold in the chocolate chips.
Heat a large skillet over medium heat and spray with cooking
spray. Scoop 1/4 cup of batter for each pancake, and flip when bubbles are covering the surface of the pancake. Flip and cook the other side until it is golden.