Preheat the oven to 350°F.
To make the batter: In the bowl of a stand mixer fitted with the paddle attachment, cream the butter, sugar and vanilla extract.
Add in the eggs and mix on low until combined. Scrape down the side of the bowl and mix again until combined.
In a separate bowl, mix together the cake flour and sea salt. Add the milk and then the flour mixture and mix on low until combined, scraping down the sides of the bowl as needed to ensure a smooth batter and everything is mixed.
Grease the bundt pan well with canola oil cooking spray. Pour the cake batter into the bundt pan.
Bake for 1 hour 30 minutes or until a toothpick inserted in the center comes out clean and the top is golden brown. Allow to cool completely in the pan.
To make the glaze: In a small saucepan add the butter. Put over low/medium heat and cook until the butter has browned and small specs appear. Be careful, as this can burn easily, be sure to watch it and remove it from heat when it’s done.
In a medium bowl, add the brown butter, powdered sugar, cocoa powder, and milk and whisk until combined into a smooth glaze. Pour the glaze over the top of the cake. Sprinkle with chocolate sprinkles (optional)!
Store in a cake dome for up to 3 days.