Baked Cheddar Jalapeño Onion Dip

Ingredients

• 1/2 teaspoon ground Cumin
• 1/2 teaspoon Chili Powder
• 1/2 teaspoon Garlic Powder
• 8 ounces Cream Cheese (, at room temperature (1 package))
• 1 cup Mayonnaise ((preferably Best Foods/Hellmans brand))
• 1 1/2 cups  freshly grated Cheddar cheese (, divided)
• 2-3 Jalapeños (, diced (seeded if desired for less spicy))
• 1 medium Onion (, diced (try using sweet onion, it'll taste better!))
• 2 teaspoons Black Pepper (, freshly cracked if possible)