Preheat oven to 350 F
In a large bowl, combine flour, salt, baking powder, and cinnamon
In a separate large bowl, combine melted butter, sugar, eggs, heavy whipping cream and lemon juice
Add in blackberries and stir
Spray a standard sized loaf pan thoroughly with non-stick cooking spray and pour batter into pan
Bake for 1 hour 20 minutes, or until a toothpick inserted into the middle comes out clean
Allow to cool for 15 minutes before cutting and serving
Glaze is optional, but recommended! Ice cream is AMAZING served on top as well!