Add all ingredients to a blender. Blend until smooth, stopping as needed to scrape down the sides. Transfer to a glass jar and refrigerate.
For the Brownies
Prep the Chickpeas - Add chickpeas to a saucepan and cover with water by about 1/2 inch. Add the baking soda and bring to a boil. Reduce heat and simmer for 15 minutes until very tender. Drain (do not rinse!) and transfer to a food processor, spreading them out to cool for about 10 minutes.
Make the Brownie Batter - Preheat the oven to 350°F. Line an 8×8 baking dish with parchment paper, leaving overhang for easy removal. Once chickpeas have cooled slightly, add maple syrup, almond butter, vanilla, and milk to the food processor.
Blend until smooth. Add oat flour, cocoa powder, and salt. Blend again until the mixture becomes thick like brownie batter.Spread half the batter evenly into the prepared pan. Add a generous layer of date caramel.
Spread the remaining brownie batter on top. Sprinkle chocolate chips if using. Bake for 15–17 minutes, until set at the edges and fudgy in the center.
Allow brownies to cool for 30 minutes at room temperature. Chill for at least 1 hour (they slice best when cold). Cut into squares and enjoy!