Preheat the oven to 400 degrees. Line a sheet pan with parchment paper. Set an oven rack on the middle level of the oven. Measure 1 cup of heavy cream and place in the freezer while proceeding with the recipe. (You want the cream to be in the freezer for at least 15 minutes.)
Place butter in a microwave-safe bowl, cover with a paper towel and heat on high for 1 minute. If not completely melted, return to microwave for 10-second intervals till melted. Set aside to cool a bit while prepping other ingredients.
Whisk flour, baking powder, baking soda, sugar, lemon zest and salt in a medium-size bowl. Stir to combine.
After heavy cream has been chilled in the freezer for 15-20 minutes, combine it with the melted butter. Stir with a fork until butter forms small clumps or globules (see the picture above in the post).
Make a well in the center of the dry ingredients and add the butter/cream mixture and the blueberries. Stir gently with a rubber spatula from the bottom up, working your way around the bowl until all flour is incorporated and the batter pulls away from the sides of the bowl. At first, it will seem like there’s too much flour. Keep stirring and it will all mix in. The batter will be very thick, like cookie dough. Don’t over-mix it, but you do want to make sure all the little flour bits are incorporated.
Spray a cookie scooper (see notes above) or large spoon with non-stick cooking spray. Scoop up scones in mounds onto prepared pan. When you scoop, try to get some of the blueberries into each portion. Space the scones 2-inches apart to allow for some spreading. Brush the scones with the melted butter and sprinkle with the cane (or coarse) sugar.
Refrigerate scones for at least 15 minutes or longer. If you don’t have room for a sheet pan in your refrigerator, put them on a plate then add them to the sheet pan before baking.
Bake for 18-22 minutes or until light golden brown. Transfer to a wire cooling rack. Serve warm or at room temperature.