Prepare 3 six-inch cake pans with parchment on bottom and rub or spray oil around the sides.
Strawberry Puree
Put strawberries, sweetener and lemon juice in pan with 1/2 cup water.
Cook for 20-30 minutes on low until thickened and most liquid is cooked down. You can pour excess liquid out for another use.
Put in blender and blend to make puree. Don't over-blend. Allow some of the strawberry texture to remain, more like a blended jam.
Strawberry Cake Instructions
Mix all dry ingredients (not the sweetener) in a bowl. Whisk. Set aside.
Beat eggs until frothy.
Add sweetener.
Stream in avocado oil.
Add sour cream, strawberry puree, extracts.
Add in dry ingredients and mix on low until just mixed.
If making a layer cake, bake at 350 degrees F. (180 C.) for 30-35 minutes, until interior middle reaches 207 degrees. You may need to cover with foil at around 25 minutes.
Use an offset spatula to go around the sides of the cakes. Wait 15 minutes and then turn over onto a piece of cardboard. Place the cake pan back on top of the cake to finish cooling. The steam will keep the cake moist.
Cool cakes completely before frosting.
Once the cakes are completely cooled, trim off the tops so the cakes are even.
Strawberry Cream Cheese Frosting
Butter and cream cheese both needs be soft. Cut into small pieces. You can microwave cream cheese for 10-15 seconds to soften it.
Whip butter until fluffy. Whip Cream cheese separately and mix both together.
Add Swerve Confectioner's Sweetener 1/2 cup at a time.
Make sure puree is at room temperature. (You can microwave a few seconds if need be).
Add puree a little at a time. Keep mixing until incorporated. You want it soft enough, but not runny.
Assemble
To frost cakes, use a piping bag with a large round tip between layers. You can do a crumb coat or a naked cake (as pictured). If you do a crumb coat, put in refrigerator at least 20 minutes before applying more frosting. Make sure cake is chilled and ganache is chilled before pouring on. If the ganache is hot it will run out too fast. You will want the ganache to be pourable but not warm.
Add In some strawberry extract, if needed.
Notes
You can make this recipe as a one layer cake, or double recipe and make an 8 inch three layer cake or 9 inch double layer cake.