Preheat oven to 315°F. Lightly flour a 6-cup bundt pan or spray with nonstick spray.
In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugar together until pale and fluffy, about 5-7 minutes.
1½ cups unsalted butter, 2¾ cups granulated sugar
Add in the eggs, one at a time. Mix for about 30 seconds in between one egg. You may need to scrape down the sides in between eggs as well. Add in the vanilla and salt.
5 large eggs, 1 tablespoon pure vanilla extract, ½ teaspoon kosher salt
Reduce the speed to just above low and add the flour in one cup at a time. Once combined (be careful not to over mix), add in the ginger beer slowly so it doesn't splash up. Turn off the mixer and set aside.
3 cups cake flour, 1 cup Crabbie's Scottish Raspberry Ginger Beer
Add the raspberries to the bottom of the bundt cake pan, spreading them out to cover the bottom.
1 pint fresh raspberries
Pour the cake batter over the raspberries and smooth out the top.
Bake for 75-80 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Allow the cake to cool for at least 10 minutes, then unmold, transfer to a plate, and set aside.