Preheat the oven to 350℉ and grease and line a 9x5 inch loaf pan and line it with a strip of parchment paper.
In a large bowl, whisk together 1 ¾ cups oat flour, ½ cup almond flour , 1 cup granulated sugar, 2 teaspoons baking powder, and ½ teaspoon fine sea salt.
In a medium bowl, whisk together the ½ cup unsalted butter, 2 large eggs, ¾ cup buttermilk. Stir the wet ingredients into the dry mix, then fold in the 2 cups strawberries.
Pour the batter into the prepared loaf pan and rest for 15-20 minutes, then bake for about 1 hour, until a tester comes out clean. Place on a wire rack and cool for 15 minutes, then turn out to cool completely.
When the cake is completely cooled, whisk the 1 cup powdered sugar with 2 teaspoons vanilla extract, then drizzle over the cake.
Notes
Can I use frozen strawberries? I often say that fresh or frozen berries can be used interchangeably in my recipes (for example, my gluten free berry cake works great with either). But in this loaf cake, I don't recommend frozen strawberries. As they bake and thaw, they will release too much moisture into the batter. Use fresh strawberries here!
Brown the butter. For extra depth of flavor, brown the butter first: Melt the butter in a pot set over medium-low heat and cook, swirling the pan, until it is slightly browned and smells nutty, about 5-7 minutes.
Dairy-free. Easily make this recipe dairy-free by swapping dairy-free butter or coconut oil for the butter. Make a dairy-free buttermilk by mixing 1 cup dairy-free milk with 1 tablespoon vinegar, letting it sit for 10 minutes, then measuring out the amount called for in the recipe.
Add rhubarb. Make a delectable strawberry-rhubarb loaf cake by substituting 1 cup of chopped strawberries for chopped rhubarb.