Preheat oven to 350F. Add the room-temperature butter and erythritol to a mixing bowl.
Cream together the butter and erythritol until smooth. Then, add in the softened chunks of cream cheese and beat until smooth.
Add the eggs, lemon extract, and vanilla extract in with the blended ingredients. Blend with a hand mixer until smooth.
In a medium-sized bowl, mix together the almond flour, baking powder, and salt.
Slowly add the blended dry ingredients to the batter. Use a hand blender to mix until very smooth with no clumps.
Pour the batter into a non-stick loaf pan. Bake for 60–120 minutes or until a toothpick comes out clean.
Blend together the powdered erythritol, heavy whipping cream, and vanilla extract until smooth. Wait until the pound cake is fully cooled before spreading the glaze on top.