1. Preheat your oven to 350°F (175°C) and grease a 9×5 inch loaf pan.
2. In a large bowl, cream together the softened butter and cream cheese until smooth.
3. Add the sugar and beat until fluffy.
4. Mix in the eggs one at a time, then stir in the vanilla extract.
5. In a separate bowl, whisk together the gluten-free flour, baking powder, and salt.
6. Gradually add the dry ingredients to the wet mixture, mixing until just combined.
7. Pour the batter into the prepared loaf pan and smooth the top.
8. Bake for 60-70 minutes, or until a toothpick inserted into the center comes out clean.
9. Let the cake cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
10. Serve plain or with your favorite frosting.

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