Line two baking sheets with parchment paper. Set aside.
In your stand mixer, combine softened butter and sugars on medium high for 2-3 minutes until mixture looks light and airy. Add in eggs, one at a time. Next, add in vanilla extract. Mix until well combined.
In a medium-sized bowl, whisk together flour, baking soda, chai spice, and salt. Add these dry ingredients to wet ingredients and mix until combined.
Refrigerate cookie dough for at least 4 hours or overnight. Once dough has been chilled, let it sit out at room temperature for 15 minutes. Scoop dough out with a cookie scoop and place on baking sheet.
Set oven to 350°F. Bake one sheet at a time for 14-15 minutes. Cookies will look a little undercooked in the middle which is fine. They will continue to cook on the baking sheet. Leave cookies on baking sheet for 5 minutes before transferring to a cooling rack. I like to enjoy mine with a drizzle of honey on top but that's totally optional.