Preheat your oven to 400°F (200°C) and prepare a baking sheet lined with parchment paper.

In a skillet over medium-high heat, cook the bacon until browned and crispy, about 10 minutes. Transfer to a plate lined with paper towels.

In the same skillet, add the chopped onion and sauté until translucent, about 5-7 minutes. Add minced garlic and cook for an additional 2-3 minutes.

Reduce heat to low, add softened cream cheese and sour cream in the skillet, and stir until smooth and creamy, about 3-5 minutes.

Spread the cream cheese mixture evenly over the flatbread.

Layer with shredded mozzarella and cheddar cheese, crumbled bacon, and sliced jalapeños.

Bake in the preheated oven for 25-30 minutes until the crust is firm and cheese is bubbly and golden brown.

Let cool for 5 minutes, slice into squares and serve warm, garnished with chopped parsley if desired.