1 ½cupscoconut sugarmuscovado sugar or light brown sugar
1 ¼cupunrefined avocado oilolive oil, or melted coconut oil + more for greasing the skillet
2large eggs + 1 large egg yolk
1 ½teaspoonspure vanilla extract
1 ½cupswhole wheat pastry flour or flour of choicesuch as spelt or GF flour of choice such as King Arthur multi-purpose GF flour*
1cupoat flouryou can take a cup of rolled oats and process them in the food processor to make your own oat flour look for GF oats/oat flour if necessary
1teaspoonbaking soda
¾teaspoonaluminum-free baking powder
1teaspoonfine sea salt
1 ¾cupssemi-sweet or dark chocolate chips or chopped chocolatedon't use small chocolate chips. The bigger the better.
Instructions
Preheat oven to 350 degrees. Grease a 10-inch cast iron skillet with avocado oil. You can also use a 10-inch pie plate or a 9 x 9-inch baking pan.
Place the sugar and avocado oil in a large mixing bowl and whisk until combined. Whisk in eggs and vanilla.
In a medium bowl whisk together the flours, baking powder, baking soda and sea salt. Slowly add to the oil/sugar mixture and blend until everything is combined.
Stir in the chocolate.
Spread the mixture into the <g class="gr_ gr_75 gr-alert gr_spell gr_inline_cards gr_disable_anim_appear ContextualSpelling ins-del multiReplace" id="75" data-gr-id="75">prepared</g> skillet and bake until golden brown, about 30-40 minutes. (33 minutes is perfect in my oven.) The edges should be dry and the center should be somewhat soft, but it will settle once it cools. You want it to be just slightly underdone. If you are not eating the cake in the next hour or you will wait until it is completely cooled, you definitely want to undercook it. Allow it to cool at least 20 minutes so that it will slice properly. If you want to eat it right away, it may not slice well.
Notes
*If using gluten-free flour, also add 1 teaspoon xanthan gum.