Preheat your oven to 350°F (175°C). Grease and flour a 9 × 5-inch loaf pan.

In a large bowl, cream together the softened butter and sugar using an electric mixer on medium speed until light and fluffy, about 5 minutes.

Add the eggs, one at a time, beating well after each addition. Then stir in the vanilla extract.

In another bowl, whisk together the flour, baking powder, baking soda, and salt.

Gradually add the dry ingredients to the butter mixture, alternating with the buttermilk. Start and end with the dry ingredients, mixing just until combined.

Gently fold in the sliced strawberries, being careful not to overmix the batter.

Pour the batter into the prepared loaf pan and smooth the top with a spatula.

Bake in the preheated oven for 50-60 minutes, or until a toothpick inserted in the center comes out clean.

Once baked, remove from the oven and allow the cake to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely.