Preheat oven to 325°F. Line an 8-inch square baking pan with parchment paper or greased foil. Set aside.
In a medium bowl, whisk together almond butter, coconut sugar, maple syrup and coconut oil. Whisk until it resembles grainy caramel.
Add cocoa powder in ¼ cup increments, whisking until shiny and smooth, scraping down the sides of the bowl as needed. Whisk in vanilla and salt.
Add flax eggs in, whisking until well incorporated. In thirds, whisk in the oat flour. As the batter gets harder to whisk, switch to folding with a rubber spatula until well incorporated.
Fold in ½ cup pecans and ¼ cup chocolate chips. Pour batter into pan. Using a rubber spatula, smooth into an even layer.
For the topping, sprinkle 1/2 cup pecans evenly over brownies. Press pecans down into the top of the brownies.
Bake for 28-32 minutes. Mine took 30 minutes. Cool for 1 hour, or until completely cool. Lift brownies out of baking pan and place onto an even surface. Slice into 16 squares. Using a rubber spatula or fork, nudge brownies apart, creating some space in between them.
In a microwave-safe bowl, add 1/4 cup chocolate chips and ¼ teaspoon coconut oil. Heat in 20-second increments until softened and melted. Stir until smooth. Spoon melted chocolate into a small zip bag and trim a tiny corner off. Pipe chocolate in a zigzag pattern across the top of each brownie. Enjoy! Storing instructions below.