Get ready by preheating your oven to 350°F (175°C). Line a 10x15-inch jellyroll pan with a piece of parchment paper – this makes cleanup and cutting super easy!
In a large mixing bowl with a stand mixer (or using a hand mixer), beat together the softened butter (or coconut oil), granulated sugar, and brown sugar until the mixture is light and wonderfully fluffy.
Next, beat in the room-temperature eggs (if making chia eggs, simply mix 2 tablespoons ground chia seeds with 6 tablespoons water and let sit for 1-2 minutes until goopy, then add) and the vanilla extract until everything is smoothly combined.
Sprinkle the baking soda and salt over your mixture, beat briefly until just combined, then gently add in the flour on a low speed. Mix until just incorporated, being careful not to overmix.
Stir in 1 3/4 cups of your delicious chocolate chips into the dough until they're evenly distributed.
Press the cookie dough into an even layer in your prepared pan. Then, press the remaining 1/2 cup of chocolate chips generously on top for extra chocolatey goodness.
Bake for 17-22 minutes, or until the edges are lightly browned and the cookie slab looks set.
This is important for perfect hearts: Let the entire cookie slab cool completely in the pan for about 1 hour. Once cool, use the parchment paper to carefully lift it out onto a cutting board.
Now for the fun part! Use a heart-shaped cookie cutter (a 2 3/4-inch wide cutter works great) to cut out as many heart cookies as you can. Don't worry about the leftover bits – they're delicious chef's treats!
Store your beautiful heart-shaped cookies in an airtight container at room temperature for up to 5 days, ready to share or enjoy yourself!