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, cane 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 a 10-inch silicone bundt pan well with canola oil cooking spray or butter. Pour the cake batter into the bundt pan.
Bake for 1 hour 30 minutes or until a wooden pick inserted in center comes out clean.
Allow to cool completely in the cake pan. Once cake is cooled, remove it from the bundt pan, carefully.
To make the glaze: In a large mixing bowl, add the powdered sugar, milk, and strawberry powder. Whisk together until combined into a smooth glaze. Place cake on a cake stand, and drizzle the frosting over the top of the cake so it runs down both sides. Sprinkle the top of the frosting with rainbow sprinkles.
Store in a cake dome for up to 7 days.