Dig your waffle maker out from the back of your cabinets and preheat it. I usually put parchment or wax paper under the waffle maker to make clean up easier.
In a small bowl, whisk together flour, baking powder, baking soda, salt, sugars, and cocoa. In another bowl whisk together oil, eggs, vanilla, and buttermilk.
Add the wet ingredients to the dry ingredients and stir until just combined. Batter will be lumpy. Stir in the chocolate chips.
Depending on the size of your waffle iron, you may need more or less batter. I used about 2/3 cup for one waffle. Pour batter onto hot waffle iron then scatter evenly with a handful of chocolate chips. Close the waffle iron and let cook--it could take anywhere from 4-7 minutes. Mine are perfect soon after the steam has subsided.
Carefully remove waffle from iron and place in a single layer on a baking sheet with a cookie cooling rack on it. Keep warm in a 200 degree oven until ready to serve.
To serve, top waffles with slices of fresh strawberries, a swirl of whipped cream, and a drizzle of chocolate sauce. This made 5 waffles in my iron, but if you have a large Belgian waffle iron, it will probably only make 3.