Preheat oven to 350°F. Grease a 9x12-inch baking dish with cooking spray.
In a large bowl, stir together the oats, ground flaxseed, baking powder, salt, cocoa powder, and cinnamon.
In medium bowl, whisk together the honey, butter/coconut oil, pumpkin, milk, eggs, and vanilla.
Pour the wet ingredients into the dry ones. Stir until combined. Then, stir in the chocolate chips.
Pour batter into the baking dish. Bake for about 20 minutes (or until the edges are firm and the middle is still a little soft).
Serve warm in a bowl with your favorite cut-up fruit (i.e. bananas, strawberries, raspberries) and milk on top.